CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income (loss)	$ (6,820)	$ (15,229)	$ (38,816)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	3,624	6,454	8,544
Goodwill impairment	0	0	5,133
Intangible asset impairment	0	0	9,014
Provision for bad debt	291	293	241
Provision for customer credits	83	250	217
Share-based compensation	1,984	2,402	4,866
Right-of-use assets	1,426	1,697	0
Lease liabilities	(1,248)	(1,706)	0
Write-down of assets	0	59	0
Loss on disposal of asset	6	0	0
Long-lived asset impairment	0	0	1,968
(Gain)/loss on investment	0	(250)	(25)
Change in deferred tax assets	0	0	692
Changes in assets and liabilities:
Accounts receivable	9,722	2,304	(1,445)
Prepaid expenses and other current assets	418	(20)	814
Other non-current assets	19	(145)	(278)
Accounts payable	(7,279)	(3,753)	5,076
Accrued expenses and other current liabilities	(325)	(1,773)	1,079
Net cash provided by (used in) operating activities	1,901	(9,417)	(2,920)
Cash flows from investing activities:
Purchases of property and equipment	(596)	(1,640)	(896)
Proceeds from sale of investment	0	250	125
Net cash used in investing activities	(596)	(1,390)	(771)
Cash flows from financing activities:
Borrowings under PNC credit facility	28,564	73,968	0
Principal payments on PNC credit facility	(32,308)	(70,223)	0
Borrowings under CNC credit facility	71,072	0	0
Principal payments on CNC credit facility	(60,887)	0	0
Principal payments on MUFG Union Bank credit facility	0	0	(8,000)
Borrowings under the PPP loan	1,384	0	0
Proceeds from issuance of common stock	0	0	200
Payments on convertible note	0	(1,000)	0
Payments under financing agreement	(44)	0	0
Net proceeds from stock option exercises	75	408	98
Net cash (used in) provided by financing activities	7,856	3,153	(7,702)
Net decrease in cash and cash equivalents	9,161	(7,654)	(11,393)
Cash and cash equivalents and restricted cash, beginning of period	5,946	13,600	38,512
Cash and cash equivalents and restricted cash, end of period	15,107	5,946	13,600
Reconciliation of cash and cash equivalents and restricted cash
Cash and cash equivalents, beginning of period	892	13,600	24,993
Restricted cash at beginning of period	5,054	0	0
Cash and cash equivalents and restricted cash, beginning of period	5,946	13,600	38,512
Cash and cash equivalents, end of period	10,803	892	13,600
Restricted cash at end of period	4,304	5,054	0
Cash and cash equivalents and restricted cash, end of period	15,107	5,946	13,600
Supplemental disclosure of cash flow information:
Cash paid for income taxes	1	12	4
Cash refunds for income taxes	849	128	223
Cash paid for interest	845	176	118
Supplemental schedule of non-cash investing and financing activities:
Right-of-use assets obtained in exchange for operating lease liabilities	1,790	0
Financing for the purchase of fixed assets	170	0	0
Purchases on account related to capitalized software	$ 99	$ 0	$ 0