Statements of Income Statement - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues	$ 58,597	$ 46,960	$ 170,633	$ 131,627
Cost of Revenue	26,685	22,000	77,871	61,794
Gross Profit	31,912	24,960	92,762	69,833
Operating Expenses [Abstract]
Research and Development Expense	10,032	9,631	30,899	30,477
Selling, General and Administrative Expense	9,372	10,262	33,379	42,328
Amortization of Intangible Assets	515	567	1,545	1,907
Operating Expenses	19,919	20,460	65,823	74,712
Operating Income (Loss)	11,993	4,500	26,939	(4,879)
Interest Expense, net	1,440	1,328	4,207	3,950
Total other expenses (income)	(327)	337	99	372
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	10,880	2,835	22,633	(9,201)
Income Tax Expense (Benefit)	3,682	3,833	7,560	(3,067)
Net Income (Loss) Attributable to Parent	$ 7,198	$ (998)	$ 15,073	$ (6,134)
Earnings (Loss) Per Share, Basic	$ 0.23	$ (0.03)	$ 0.48	$ (0.18)
Earnings (Loss) Per Share, Diluted	$ 0.22	$ (0.03)	$ 0.47	$ (0.18)
Weighted Average Number of Shares Outstanding, Basic	31,526	33,237	31,597	33,205
Weighted Average Number of Shares Outstanding, Diluted	32,204	33,237	32,255	33,205