Description of Business and Significant Accounting Policies (Details 1) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Significant Accounting Policies [Line Items]
Revenue	$ 123,088								$ 473,107	$ 583,290	$ 515,160
Revenue		$ 115,594	$ 106,144	$ 128,281	$ 155,399	$ 139,005	$ 149,413	$ 139,473	473,107	583,290	515,160
Cost of revenue									395,845	494,077	437,417
Total gross profit	23,086	20,665	15,897	17,614	23,309	21,667	22,959	21,278	77,262	89,213	77,743
Restructuring charges									1,387	1,639	2,930
Gain on change in fair value of contingent consideration, net									0	677	4,438
Operating Income (Loss)									12,055	28,010	19,605
Interest Expense									2,934	6,058	2,945
Other income (expense) (including interest income of $66 in 2020, $50 in 2019, and $8 in 2018)									(511)	417	(1,897)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest									8,610	22,369	14,763
Income tax expense									1,542	7,180	4,927
Net Income (Loss) Attributable to Parent	$ 8,447	$ 521	$ (606)	$ (1,294)	$ 9,495	$ 2,141	$ 3,219	$ 334	$ 7,068	$ 15,189	$ 9,836
Weighted Average Number of Shares Outstanding, Basic									17,131	16,827	16,608
Weighted Average Number of Shares Outstanding, Diluted									17,415	16,861	16,696
Basic earnings per share (in dollars per share)	$ 0.49	$ 0.03	$ (0.04)	$ (0.08)	$ 0.56	$ 0.13	$ 0.19	$ 0.02	$ 0.41	$ 0.90	$ 0.59
Diluted earnings per share (in dollars per share)	$ 0.47	$ 0.03	$ (0.04)	$ (0.08)	$ 0.56	$ 0.13	$ 0.19	$ 0.02	$ 0.41	$ 0.90	$ 0.59
Prepaid expenses and other current assets	$ 15,186				$ 19,115				$ 15,186	$ 19,115
Deferred revenue	16,509				23,234				16,509	23,234
Retained earnings	138,296				131,228				138,296	131,228
Assets	381,776				448,902				381,776	448,902
Accounts payable and accrued expenses	91,572				92,332				91,572	92,332
Liabilities and Equity	$ 381,776				$ 448,902				$ 381,776	$ 448,902
Leasehold Improvements [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Estimated Useful Lives									Shorter of asset life or term of lease
Building Improvements [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life									40 years
Building Improvements [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life									5 years
Machinery, Equipment, and Furniture and Fixtures [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life									10 years
Machinery, Equipment, and Furniture and Fixtures [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life									3 years
Single Automotive Customer [Member]
Significant Accounting Policies [Line Items]
Concentration Risk, Percentage									15.00%	13.00%
Sales Revenue, Net [Member] | Automotive Industry [Member]
Significant Accounting Policies [Line Items]
Concentration Risk, Percentage									25.00%	28.00%