Note 8 - Stockholders' Equity (Tables)
|
12 Months Ended |
Dec. 31, 2012
|
Note 8 - Stockholders' Equity (Tables) [Line Items] |
|
Fair Value, Assets Measured on Recurring Basis [Table Text Block] |
Derivative
liability at transaction date related to
warrants
|
|
$
|
1,957,720
|
|
Loss
on change in fair value of derivative liability related
to warrants
|
|
|
170,582
|
|
Derivative
liability at December 31, 2012 related to
warrants
|
|
$
|
2,128,302
|
|
|
Impact of Conversions to Common Stock [Table Text Block] |
|
|
Impact
to Balance Sheet
|
|
|
Increase
in
|
|
|
|
Before
Conversions
|
|
|
Impact
of
Conversions
|
|
|
After
Conversions
|
|
|
Common
Shares
Outstanding
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Impact
on assets
|
|
|
|
|
|
|
|
|
|
|
|
|
Deferred
costs
|
|
$
|
799,123
|
|
|
$
|
(799,123
|
)
|
|
$
|
-
|
|
|
|
-
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Impact
on liabilities and equity
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Accrued
interest on converted notes
|
|
$
|
974,311
|
|
|
$
|
(974,311
|
)
|
|
$
|
-
|
|
|
|
1,092,559
|
|
Summer
2011 Notes, net
|
|
|
904,397
|
|
|
|
(904,397
|
)
|
|
|
-
|
|
|
|
2,183,334
|
|
March
2010 Notes, net
|
|
|
4,057,500
|
|
|
|
(4,057,500
|
)
|
|
|
-
|
|
|
|
4,071,000
|
|
2011
Unit Offering Notes, net
|
|
|
4,367,482
|
|
|
|
(4,367,482
|
)
|
|
|
-
|
|
|
|
9,050,834
|
|
Total
impact on liabilities
|
|
|
10,303,690
|
|
|
|
(10,303,690
|
)
|
|
|
-
|
|
|
|
16,397,727
|
|
Series
A convertible preferred stock
|
|
|
7,965,000
|
|
|
|
(7,965,000
|
)
|
|
|
-
|
|
|
|
7,965,000
|
|
Additional
paid-in capital and common stock
|
|
|
-
|
|
|
|
19,345,209
|
|
|
|
19,345,209
|
|
|
|
-
|
|
Accumulated
deficit
|
|
|
-
|
|
|
|
(1,875,642
|
)
|
|
|
(1,875,642
|
)
|
|
|
-
|
|
Total
impact on equity
|
|
|
7,965,000
|
|
|
|
9,504,567
|
|
|
|
17,469,567
|
|
|
|
7,965,000
|
|
Total
impact on liabilities and equity
|
|
$
|
18,268,690
|
|
|
$
|
(799,123
|
)
|
|
$
|
17,469,567
|
|
|
|
24,362,727
|
|
|
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
|
|
Options
Outstanding
|
|
|
Options
Exercisable
|
|
|
Range
of
Exercise
Prices
|
|
|
Weighted-
average
Exercise
price
per
share
|
|
|
Intrinsic
Value
(1)
|
|
Balance
at January 1, 2010
|
|
|
669,777
|
|
|
|
|
|
|
$0.88
|
-
|
24.00
|
|
|
$
|
4.28
|
|
|
$
|
3,694,400
|
|
Exercisable
at January 1, 2010
|
|
|
|
|
|
|
483,364
|
|
|
|
0.88
|
-
|
24.00
|
|
|
|
2.78
|
|
|
|
3,424,333
|
|
Granted
(2)
|
|
|
3,246,450
|
|
|
|
|
|
|
|
|
1.80
|
|
|
|
|
1.80
|
|
|
|
|
|
Cancelled
or forfeited
|
|
|
(153,750
|
)
|
|
|
|
|
|
|
3.20
|
-
|
24.00
|
|
|
|
5.06
|
|
|
|
|
|
Outstanding
at December 31, 2010
|
|
|
3,762,477
|
|
|
|
|
|
|
|
0.88
|
-
|
24.00
|
|
|
|
2.11
|
|
|
|
262,500
|
|
Exercisable
at December 31, 2010
|
|
|
|
|
|
|
433,746
|
|
|
|
0.88
|
-
|
24.00
|
|
|
|
3.03
|
|
|
|
262,500
|
|
Cancelled
or forfeited
|
|
|
(82,500
|
)
|
|
|
|
|
|
|
1.80
|
-
|
24.00
|
|
|
|
4.93
|
|
|
|
|
|
Outstanding
at December 31, 2011
|
|
|
3,679,977
|
|
|
|
|
|
|
|
0.88
|
-
|
9.64
|
|
|
|
2.05
|
|
|
|
-
|
|
Exercisable
at December 31, 2011
|
|
|
|
|
|
|
1,501,659
|
|
|
|
0.88
|
-
|
9.64
|
|
|
|
2.15
|
|
|
|
-
|
|
Granted
(2)
|
|
|
3,097,400
|
|
|
|
|
|
|
|
1.00
|
|
2.13
|
|
|
|
1.08
|
|
|
|
|
|
Exercised
|
|
|
(14,000
|
)
|
|
|
|
|
|
|
1.80
|
-
|
9.64
|
|
|
|
1.80
|
|
|
|
|
|
Cancelled
or forfeited
|
|
|
(331,250
|
)
|
|
|
|
|
|
|
1.80
|
-
|
9.64
|
|
|
|
2.14
|
|
|
|
|
|
Outstanding
at December 31, 2012
|
|
|
6,432,127
|
|
|
|
|
|
|
|
0.88
|
-
|
9.64
|
|
|
|
1.58
|
|
|
|
1,846,040
|
|
Exercisable
at December 31, 2012
|
|
|
|
|
|
|
2,386,909
|
|
|
|
0.88
|
-
|
9.64
|
|
|
|
2.13
|
|
|
|
205,000
|
|
|
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] |
|
|
|
Options
Outstanding
|
|
|
|
|
|
Options
Exercisable
|
|
Range
of
Exercise
Prices
|
|
|
Number
Outstanding
|
|
|
Weighted
-
Average
Remaining
Contractual
Life
|
|
|
Weighted
-
Average
Exercise
Price
|
|
|
Number
Exercisable
|
|
|
Weighted
-
Average
Exercise
Price
|
|
|
$0.88
|
-
|
1.17
|
|
|
|
3,033,900
|
|
|
|
8.53
|
|
|
$
|
0.99
|
|
|
|
287,500
|
|
|
$
|
0.89
|
|
|
1.63
|
-
|
2.13
|
|
|
|
3,216,700
|
|
|
|
8.16
|
|
|
|
1.79
|
|
|
|
1,917,882
|
|
|
|
1.80
|
|
|
3.20
|
-
|
9.64
|
|
|
|
181,527
|
|
|
|
3.55
|
|
|
|
7.61
|
|
|
|
181,527
|
|
|
|
7.61
|
|
|
|
|
|
|
|
|
6,432,127
|
|
|
|
8.20
|
|
|
|
1.58
|
|
|
|
2,386,909
|
|
|
|
2.13
|
|
|
Schedule of Nonvested Share Activity [Table Text Block] |
Nonvested
Stock Options
|
|
Shares
|
|
|
Weighted
-
Average
Grant
Date
Fair
Value
|
|
Nonvested
January 1, 2010
|
|
|
186,413
|
|
|
$
|
2.41
|
|
Granted
|
|
|
3,246,450
|
|
|
|
0.83
|
|
Forfeited
|
|
|
(41,667
|
)
|
|
|
1.92
|
|
Vested
|
|
|
(62,465
|
)
|
|
|
2.31
|
|
Nonvested
December 31, 2010
|
|
|
3,328,731
|
|
|
|
0.88
|
|
Forfeited
|
|
|
(51,833
|
)
|
|
|
0.88
|
|
Vested
|
|
|
(1,098,580
|
)
|
|
|
0.89
|
|
Nonvested
December 31, 2011
|
|
|
2,178,318
|
|
|
|
0.87
|
|
Granted
|
|
|
3,097,400
|
|
|
|
0.48
|
|
Forfeited
|
|
|
(258,517
|
)
|
|
|
0.85
|
|
Vested
|
|
|
(971,984
|
)
|
|
|
1.04
|
|
Nonvested
December 31, 2012
|
|
|
4,045,218
|
|
|
|
0.56
|
|
|
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|
|
Years
Ended December 31,
|
|
|
|
|
2012
|
|
|
2010
|
|
|
Dividend
yield
|
|
|
0%
|
|
|
|
|
0%
|
|
|
Expected
Volatility
|
|
45.17%
|
to
|
45.32%
|
|
|
|
44.81%
|
|
|
Risk
free Interest rates
|
|
0.83%
|
to
|
1.13%
|
|
|
|
2.36%
|
|
|
Expected
lives (years)
|
|
|
6.0
|
|
|
|
|
6.0
|
|
|
|
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] |
|
|
Shares
|
|
|
Weighted
-
Average
Exercise
Price
|
|
Outstanding
at January 1, 2010
|
|
|
410,542
|
|
|
$
|
0.42
|
|
Issued
|
|
|
25,444
|
|
|
|
8.00
|
|
Outstanding
at December 31, 2010
|
|
|
435,986
|
|
|
|
3.74
|
|
Expired
|
|
|
(410,542
|
)
|
|
|
3.48
|
|
Issued
|
|
|
2,122,500
|
|
|
|
0.29
|
|
Exercised
|
|
|
(225,000
|
)
|
|
|
0.01
|
|
Outstanding
at December 31, 2011
|
|
|
1,922,944
|
|
|
|
0.43
|
|
Issued
|
|
|
7,652,071
|
|
|
|
1.05
|
|
Shares
withheld on net settled exercises
|
|
|
(186,347
|
)
|
|
|
0.70
|
|
Exercised
|
|
|
(624,832
|
)
|
|
|
0.67
|
|
Outstanding
at December 31, 2012
|
|
|
8,763,836
|
|
|
|
0.95
|
|
|
Private Placements [Member]
|
|
Note 8 - Stockholders' Equity (Tables) [Line Items] |
|
Assumptions Used in Calculating Fair Value of Warrants Issued |
|
|
|
December
31,
2012
|
|
|
Transaction
Date
|
Dividend
yield
|
|
|
|
|
|
|
0%
|
|
|
|
|
|
|
|
|
|
|
|
0%
|
|
|
|
|
Expected
volatility
|
|
|
|
|
|
|
47.08%
|
|
|
|
|
|
|
|
|
|
|
|
47.64%
|
|
|
|
|
Risk
free interest rate
|
|
|
|
|
|
|
0.65%
|
|
|
|
|
|
|
|
|
|
|
|
0.75%
|
|
|
|
|
Expected
remaining term (in years)
|
|
|
|
|
|
|
4.51
|
|
|
|
|
|
|
|
|
|
|
|
5.00
|
|
|
|
|
|
Director [Member]
|
|
Note 8 - Stockholders' Equity (Tables) [Line Items] |
|
Assumptions Used in Calculating Fair Value of Warrants Issued |
|
|
Year
Ended December 31,
|
|
|
|
2012
|
|
|
2011
|
|
2010
|
|
Dividend
yield
|
|
|
0%
|
|
|
|
|
0%
|
|
|
|
0%
|
|
Expected
Volatility
|
|
40.96%
|
to
|
46.88%
|
|
|
48.67%
|
to
|
49.36%
|
|
|
44.81%
|
|
Risk
free Interest rates
|
|
0.19%
|
to
|
0.77%
|
|
|
0.81%
|
to
|
1.13%
|
|
|
2.36%
|
|
Expected
lives (years)
|
|
1.6
|
to
|
5.0
|
|
|
|
5.0
|
|
|
|
5.0
|
|
|