CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY AND COMPREHENSIVE INCOME (LOSS) (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss), net of income tax [Member]	Total
Balance at Dec. 31, 2009	$ 493,000	$ 21,464,000	$ (2,736,000)	$ (913,000)	$ 65,000	$ 18,373,000
Balance (in shares) at Dec. 31, 2009	4,931,000			368,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	0	656,000	0	0	0	656,000
Issuance of restricted stock	5,000	(5,000)	0	0	0	0
Issuance of restricted stock (in shares)	48,000
Exercise of stock options	13,000	150,000	0	0	0	163,000
Exercise of stock options (in shares)	128,000
Tax benefit of stock option exercise	0	94,000	0	0	0	94,000
Purchase of treasury stock	0	0	0	(2,000)	0	(2,000)
Purchase of treasury stock (in shares)				1,000
Forfeiture of restricted stock	(1,000)	1,000	0	0	0	0
Forfeiture of restricted stock (in shares)	(6,000)
Change in unrealized gains and losses on marketable securities, net of income tax	0	0	0	0	(46,000)	(46,000)
Net income (loss)	0	0	(3,025,000)	0	0	(3,025,000)
Comprehensive income (loss)						(3,071,000)
Balance at Dec. 31, 2010	510,000	22,360,000	(5,761,000)	(915,000)	19,000	16,213,000
Balance (in shares) at Dec. 31, 2010	5,101,000			369,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	0	152,000	0	0	0	152,000
Exercise of stock options	0	1,000	0	0	0	1,000
Exercise of stock options (in shares)	1,000
Tax benefit of stock option exercise	0	2,000	0	0	0	2,000
Change in unrealized gains and losses on marketable securities, net of income tax	0	0	0	0	(37,000)	(37,000)
Net income (loss)	0	0	3,147,000	0	0	3,147,000
Comprehensive income (loss)						3,110,000
Balance at Dec. 31, 2011	$ 510,000	$ 22,515,000	$ (2,614,000)	$ (915,000)	$ (18,000)	$ 19,478,000
Balance (in shares) at Dec. 31, 2011	5,102,000			369,000