Corporate Income Taxes - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	Jan. 13, 2016	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Loss Carryforwards [Line Items]
Deferred tax liabilities, net		$ 11,576		$ 61	$ 11,576
Deferred tax assets, state tax		3,274		17	3,274
Valuation allowance		60,368		43,681	60,368
State net operating loss carry-forward				11,020
Pre-tax earnings of foreign subsidiary				277	762	$ 968
Current tax provision				67	183	232
Deferred tax liability		587		$ 622	$ 587
Correction income tax			$ 225			16
Correction Of Prior Year Error			209			$ 209
Effective income tax rate				(211.00%)	(321.00%)	37.00%
Unrecognized tax benefits		1,155		$ 1,155	$ 1,155
Interest expense on unrecognized tax benefits				81	(334)	$ 495
Total accruals for interest		623		704	623
Unrecognized tax benefits		$ 1,187	$ 13,830	1,187	$ 1,187	$ 13,830	$ 15,659
Additional Paid-in Capital [Member]
Operating Loss Carryforwards [Line Items]
State net operating loss carry-forward				$ 590
Subsequent Event
Operating Loss Carryforwards [Line Items]
Income Tax Examination, Estimate of Possible Loss	$ 4,119
Income Tax Examination, Interest Expense Under Examination	$ 1,617