Quarterly Consolidated Financial Data (unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Consolidated Financial Data (unaudited) [Abstract]
Revenues	$ 51,057	$ 58,597	$ 59,466	$ 52,570	$ 49,591	$ 46,960	$ 43,018	$ 41,649	$ 221,690	$ 181,218	$ 176,238
Gross Profit	26,644	31,912	31,884	28,966	25,655	24,960	23,304	21,569	119,406	95,488	90,732
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	4,179	10,880	8,656	3,097	2,510	2,835	(10,995)	(1,041)	26,812	(6,691)	1,533
Net Income (Loss) Attributable to Parent	$ 2,883	$ 7,198	$ 6,027	$ 1,848	$ 1,494	$ (998)	$ (4,412)	$ (724)	$ 17,956	$ (4,640)	$ 3,458
Earnings Per Share, Basic	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0.57	$ (0.14)	$ 0.11
Earnings Per Share, Diluted	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0.56	$ (0.14)	$ 0.10
Weighted Average Number of Shares Outstanding, Basic	31,016	31,526	31,663	31,928	32,882	33,237	33,240	33,092	31,408	33,124	32,783
Weighted Average Number of Shares Outstanding, Diluted	32,075	32,204	32,339	32,549	33,504	33,237	33,240	33,092	32,166	33,124	33,388