UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and Cash Equivalents, at Carrying Value	$ 14,352	$ 27,109
Accounts Receivable, after Allowance for Credit Loss, Current	8,283	9,556
Deferred Costs, Current	7	49
Marketable Securities	0	1,755
Prepaid Expense and Other Assets, Current	4,229	3,166
Total current assets	26,871	41,635
Equipment, software, and leasehold improvements, at cost:
Equipment And Software Gross	23,731	29,464
Leasehold Improvements, Gross	1,708	2,750
Total equipment, software, and leasehold improvements	25,439	32,214
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	24,252	30,744
Net equipment, software, and leasehold improvements	1,187	1,470
Operating Lease, Right-of-Use Asset	3,656	3,992
Restricted Cash and Investments, Noncurrent	1,630	1,630
Other Assets, Noncurrent	2,940	2,878
Deferred Income Tax Assets, Net	652	727
Goodwill	16,503	16,976
Total assets	53,439	69,308
Current liabilities:
Accounts Payable, Current	1,591	2,578
Accrued Expenses And Other Current Liabilities	10,929	13,286
Deferred Revenue, Current	2,378	2,614
Total current liabilities	14,898	18,478
Deferred Revenue, Noncurrent	26	183
Deferred Income Tax Liabilities, Net	1,065	1,132
Operating Lease, Liability, Noncurrent	2,033	2,300
Other Liabilities, Noncurrent	7	1,142
Total liabilities	$ 18,029	$ 23,235
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred stock, par value (USD per share)	$ 0.001	$ 0.001
Additional Paid in Capital	$ 679,247	$ 678,381
Accumulated Other Comprehensive Income (Loss), Net of Tax	(62,688)	(61,520)
Retained Earnings (Accumulated Deficit)	(581,204)	(570,843)
Stockholders' Equity Attributable to Parent, Total	35,410	46,073
Total liabilities and equity	53,439	69,308
Preferred stock, Series A
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred stock	0	0
Series B Preferred Stock
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred stock	8	8
Preferred stock, Undesignated series
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred stock	0	0
Common Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Common Stock, Value, Issued	$ 47	$ 47