Consolidated Statement of Stockholders' Equity (Unaudited) - 3 months ended Mar. 31, 2017 - USD ($)
Total
Common Stock
Additional Paid-In Capital
Treasury Stock
Retained Earnings
Balance at beginning of period (in shares) at Dec. 31, 2016   30,421,273      
Treasury stock at beginning of period (in shares) at Dec. 31, 2016 (2,289,794)     (2,289,794)  
Balance at beginning of period at Dec. 31, 2016 $ 358,149,730 $ 3,045 $ 328,676,749 $ (49,148,912) $ 78,618,848
Increase (decrease) in stockholders' equity:          
Share compensation expense 2,655,329   2,655,329    
Exercise of stock options (in shares)   1,500      
Exercise of stock options 11,790 $ 0 11,790    
Common stock issued for vested restricted stock (in shares)   175,240      
Common stock issued for vested restricted stock 0 $ 18 (18)    
Common stock issued for vested performance shares (in shares)   28,804      
Common stock issued for vested performance shares 0 $ 3 (3)    
Common shares withheld and retired to satisfy employee tax withholding obligations upon vesting of share-based awards (in shares)   (57,413)      
Common shares withheld and retired to satisfy employee tax withholding obligations upon vesting of share-based awards (1,242,154) $ (6) (1,242,148)    
Purchases of treasury stock (in shares)       (37,095)  
Purchases of treasury stock (851,084)     $ (851,084)  
Net (loss) income $ (2,872,043)       (2,872,043)
Balance at end of period (in shares) at Mar. 31, 2017   30,569,404      
Treasury stock at end of period (in shares) at Mar. 31, 2017 (2,326,889)     (2,326,889)  
Balance at end of period at Mar. 31, 2017 $ 355,851,568 $ 3,060 $ 330,101,699 $ (49,999,996) $ 75,746,805