CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Total
BALANCE at Dec. 31, 2011	$ 188	$ 97,972	$ (250)	$ 12,813	$ 2	$ 110,725
BALANCE (in shares) at Dec. 31, 2011	18,821,728
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of warrants	0	98	0	0	0	98
Stock-based compensation - grants of common stock	0	405	0	0	0	405
Stock-based compensation - grant of common stock (in shares)	30,000
Stock-based compensation related to stock options and restricted stock	0	5,709	0	0	0	5,709
Stock options issued to consultants for services	0	83	0	0	0	83
Issuance of common stock, net	30	37,484	0	0	0	37,514
Issuance of common stock, net (in shares)	3,023,432					3,023,432
Repurchase and retirement of common stock	(9)	(10,747)	0	0	0	(10,756)
Repurchase and retirement of common stock (in shares)	(842,961)
Exercise of stock options	0	67	0	0	0	67
Exercise of stock options (in shares)	10,048
Warrants exercised	1	133	0	0	0	134
Warrants exercised (in shares)	17,756
Retirement of treasury stock	0	(250)	250	0	0	0
Retirement of treasury stock (in shares)	(16,056)
Other comprehensive income	0	0	0	0	859	859
Net income (loss)	0	0	0	22,489	0	22,489
BALANCE at Dec. 31, 2012	210	130,954	0	35,302	861	167,327
BALANCE (in shares) at Dec. 31, 2012	21,043,947
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation related to stock options and restricted stock	0	4,892	0	0	0	4,892
Stock options issued to consultants for services	0	93	0	0	0	93
Repurchase and retirement of common stock	(21)	(31,008)	0	0	0	(31,029)
Repurchase and retirement of common stock (in shares)	(2,144,452)
Exercise of stock options	0	23	0	0	0	23
Exercise of stock options (in shares)	3,750
Other comprehensive income	0	0	0	0	678	678
Net income (loss)	0	0	0	18,377	0	18,377
BALANCE at Dec. 31, 2013	189	104,954	0	53,679	1,539	160,361
BALANCE (in shares) at Dec. 31, 2013	18,903,245					21,043,947
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of warrants	0	81	0	0	0	81
Stock-based compensation related to stock options and restricted stock	0	4,862	0	0	0	4,862
Stock options issued to consultants for services	0	76	0	0	0	76
Stock options issued to consultants for services (in shares)	1,663
Issuance of common stock, net	7	1,406	0	0	0	1,413
Issuance of common stock, net (in shares)	645,000					645,000
Restricted stock issued, net of payroll taxes paid	8	(988)	0	0	0	(980)
Restricted stock issued, net of payroll taxes paid (in shares)	826,337
Other comprehensive income	0	0	0	0	(2,052)	(2,052)
Net income (loss)	0	0	0	(121,496)	0	(121,496)
BALANCE at Dec. 31, 2014	$ 204	$ 110,391	$ 0	$ (67,817)	$ (513)	$ 42,265
BALANCE (in shares) at Dec. 31, 2014	20,376,245					20,376,245