CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit
Balance at Dec. 31, 2014	$ 89,329	$ 108	$ 162,433	$ (5,637)	$ (67,575)
Balance (in shares) at Dec. 31, 2014		108,776,247		986,636
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	3,933		3,933
Exercise of stock options	1,276	1	222	1,053
Exercise of stock options (in shares)	760,156	647,656		(112,500)
Exercise of warrants	0
Exercise of warrants (in shares)		0		0
Issuance of restricted stock	0		(8,258)	8,258
Restricted stock shares cancelled/forfeited (in shares)		(715)
Issuance of restricted stock (in shares)		34,250		(1,256,608)
Shares issued for services performed	71		71
Shares issued for services performed (in shares)	11,321	11,321
Stock repurchase	(12,295)			(12,295)
Stock repurchase (in shares)	1,359,753			1,359,753
Net income (loss)	4,087				4,087
Balance at Mar. 31, 2015	$ 86,401	$ 109	$ 158,401	$ (8,621)	$ (63,488)
Balance (in shares) at Mar. 31, 2015		109,468,759		977,281