Consolidated Statements of Stockholders' Equity (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2009	$ 185,211	$ 206,740,492	$ (292,297)	$ (63,006,207)	$ 0	$ 143,627,199
Common Stock Balance, Issued (in shares) at Dec. 31, 2009	18,521,045
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (loss)	0	0	0	(8,774,956)	0	(8,774,956)
Issuance of stock for employer 401(k) matching contribution	390	573,190	0	0	0	573,580
Issuance of stock for employer 401(k) matching contribution (in shares)	38,993					38,993
Excess tax benefit from the exercise of stock options, warrants, SARs, and RSAs	0	164,969	0	0	0	164,969
Exercise of stock options, warrants, and SARs	585	101,769	0	0	0	102,354
Exercise of stock options, warrants, and SARs (in shares)	58,511
Issuance of restricted stock awards	3,070	(3,070)	0	0	0	0
Issuance of restricted stock awards (in shares)	307,000
Stock-based compensation expense	0	3,799,031	0	0	0	3,799,031
Other Comprehensive Income (Loss)	0	0	(198,509)	0	0	(198,509)
Balance at Dec. 31, 2010	189,256	211,376,381	(490,806)	(71,781,163)	0	139,293,668
Common Stock Balance (in shares) at Dec. 31, 2010	18,925,549
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (loss)	0	0	0	7,428,429	0	7,428,429
Issuance of stock for employer 401(k) matching contribution	693	649,434	0	0	0	650,127
Issuance of stock for employer 401(k) matching contribution (in shares)	69,276					69,276
Excess tax benefit from the exercise of stock options, warrants, SARs, and RSAs	0	3,237,219	0	0	0	3,237,219
Exercise of stock options, warrants, and SARs	1,081	163,528	0	0	0	164,609
Exercise of stock options, warrants, and SARs (in shares)	108,169
Issuance of restricted stock awards	4,703	(4,703)	0	0	0	0
Issuance of restricted stock awards (in shares)	470,250
Stock-based compensation expense	0	3,640,185	0	0	0	3,640,185
Other Comprehensive Income (Loss)	0	0	226,957	0	0	226,957
Balance at Dec. 31, 2011	195,733	219,062,044	(263,849)	(64,352,734)	0	154,641,193
Treasury Stock Balance (in shares) at Dec. 31, 2011						0
Common Stock Balance (in shares) at Dec. 31, 2011	19,573,244					19,573,244
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (loss)	0	0	0	(6,171,159)	0	(6,171,159)
Issuance of stock for employer 401(k) matching contribution	0	32,760	0	0	545,559	578,319
Issuance of stock for employer 401(k) matching contribution (in shares)					(60,852)	60,852
Excess tax benefit from the exercise of stock options, warrants, SARs, and RSAs	0	225,004	0	0	0	225,004
Exercise of stock options, warrants, and SARs	214	58,914	0	0	8,972	68,100
Exercise of stock options, warrants, and SARs (in shares)	21,460				(51,500)
Issuance of restricted stock awards	3,758	(806,393)	0		802,636	0
Issuance of restricted stock awards (in shares)	375,720				(97,280)
Issuance of restricted stock units	0	0	0	0	0	0
Issuance of restricted stock units (in shares)					(11,250)
Return of forfeited shares	0	0	0	0	0	0
Return of forfeited shares (in shares)					64,750
Stock-based compensation expense	0	2,608,094	0	0	0	2,608,094
Treasury stock buyback	0	0	0		(1,395,494)	(1,395,494)
Treasury stock buyback (in shares)					160,407
Other Comprehensive Income (Loss)	0	0	10,958	0	0	10,958
Balance at Dec. 31, 2012	$ 199,705	$ 221,180,420	$ (252,891)	$ (70,523,893)	$ (38,327)	$ 150,565,014
Treasury Stock Balance (in shares) at Dec. 31, 2012					4,275	4,275
Common Stock Balance (in shares) at Dec. 31, 2012	19,970,424					19,970,424