|
Consolidated Statement of Stockholders' Equity (USD $)
|
Total
|
Common Stock [Member]
|
Additional Paid-in Capital [Member]
|
Retained Earnings [Member]
|
| Stockholders' equity at beginning of period at Dec. 31, 2013 |
$ 159,230,031 |
$ 2,291 |
$ 106,831,802 |
$ 52,395,938 |
| Common stock, shares at beginning of period at Dec. 31, 2013 |
22,900,471 |
22,900,471 |
|
|
| Increase (decrease) in stockholders' equity: |
|
|
|
|
| Share compensation expense |
2,413,348 |
|
2,413,348 |
|
| Exercise of stock options (in shares) |
|
13,575 |
|
|
| Exercise of stock options |
167,360 |
1 |
167,359 |
|
| Common stock issued for vested restricted stock (in shares) |
|
153,762 |
|
|
| Common stock issued for vested restricted stock |
0 |
16 |
(16) |
|
| Common shares withheld and retired to satisfy employee tax witholding obligations upon vesting of restricted stock (in shares) |
|
(43,784) |
|
|
| Common shares withheld and retired to satisfy employee tax withholding obligations upon vesting of restricted stock |
(853,923) |
(4) |
(853,919) |
|
| Tax benefit from exercise of stock options |
135,964 |
|
135,964 |
|
| Net income |
6,674,176 |
|
|
6,674,176 |
| Stockholders' equity at end of period at Jun. 30, 2014 |
$ 167,766,956 |
$ 2,304 |
$ 108,694,538 |
$ 59,070,114 |
| Common stock, shares at end of period at Jun. 30, 2014 |
23,024,024 |
23,024,024 |
|
|