Income Taxes - Net deferred tax assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Receivable allowance	$ 43	$ 34
Goodwill	0	347
Accumulated depreciation	214	0
Restructuring accrual	376	45
Intangible assets	484	219
Compensation expense	417	690
Federal net operating loss carryforward	58,532	55,865
State net operating loss carryforward	6,040	6,502
Accrued expenses	344	17
Deferred rent	102	102
Deferred revenue	343	0
Other	43	18
Gross deferred tax assets	66,938	63,839
Valuation allowance	(66,929)	(63,817)
Deferred tax assets, net of valuation allowance	9	22
Deferred tax liabilities:
Impairment and accumulated depreciation	0	(22)
Interest	(9)	0
Goodwill	(7)	0
Gross deferred tax liabilities	(16)	(22)
Net deferred tax assets	$ (7)	$ 0