Consolidated Statement of Stockholders' Equity (USD $)	Total	Common Stock	Treasury Stock	Additional Paid-In	Retained	Non-controlling Interest
Beginning at Dec. 31, 2012	$ 225,234,000	$ 275,000	$ (3,003,000)	$ 160,973,000	$ 66,939,000	$ 50,000
Treasury stock, shares at Dec. 31, 2012	(317,731)		(317,731)
Balance, shares at Dec. 31, 2012	27,530,220	27,530,221
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	1,132,000			1,132,000
Exercise of stock options	510,000	2,000		508,000
Contributions from non-controlling interest	33,000
Exercise of stock options, shares	97,100	97,100
Net income (loss)	(860,000)				(860,000)
Net Income (Loss) Attributable to Noncontrolling Interest	(25,000)					(25,000)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(885,000)
Beginning at Jun. 30, 2013	$ 226,024,000	$ 277,000	$ (3,003,000)	$ 162,613,000	$ 66,079,000	$ 58,000
Treasury stock, shares at Jun. 30, 2013	(317,731)		(317,731)
Balance, shares at Jun. 30, 2013	27,627,321	27,627,321