|
Earnings (loss) per common share (Details) (USD $)
|
3 Months Ended |
9 Months Ended |
|
Sep. 30, 2012
|
Sep. 30, 2011
|
Sep. 30, 2012
|
Sep. 30, 2011
|
| Numerator [Abstract] |
|
|
|
|
| Net income (loss) - basic and diluted |
$ (367,077) |
$ (5,244,745) |
$ (11,503,729) |
$ (4,905,194) |
| Preferred stock dividend and accretion |
221,142 |
222,281 |
627,031 |
660,508 |
| Net loss available to common shareholders |
$ (588,219) |
$ (5,467,026) |
$ (12,130,760) |
$ (5,565,702) |
| Denominator [Abstract] |
|
|
|
|
| Weighted average shares outstanding - basic (in shares) |
4,250,990 |
4,243,378 |
4,250,990 |
4,242,905 |
| Dilutive effect of common stock options and restricted stock awards (in shares) |
0 |
0 |
0 |
0 |
| Weighted average shares outstanding - diluted (in shares) |
4,250,990 |
4,243,378 |
4,250,990 |
4,242,905 |
| Earnings (loss) per share - basic and diluted [Abstract] |
|
|
|
|
| Earnings (loss) per share - basic (in dollars per share) |
$ (0.14) |
$ (1.29) |
$ (2.85) |
$ (1.31) |
| Effect of dilutive common stock options (in dollars per share) |
$ 0 |
$ 0 |
$ 0 |
$ 0 |
| Earnings (loss) per share - diluted (in dollars per share) |
$ (0.14) |
$ (1.29) |
$ (2.85) |
$ (1.31) |
|
Stock Options [Member]
|
|
|
|
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| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
|
|
|
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| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) |
266,530 |
|
266,530 |
|
|
Warrants [Member]
|
|
|
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
|
|
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) |
|
|
499,029 |
499,029 |