CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 28,543	$ 40,562
Accounts receivable, less allowance for doubtful accounts of $84 and $41, respectively	14,382	9,893
Prepaid and other	1,338	671
Current assets of discontinued operations	0	941
Total current assets	44,263	52,067
Property and equipment, net	217	170
Operating lease right-of-use assets	542	0
Deferred tax assets, non-current	725	583
Restricted cash, non-current	379	352
Other assets, non-current	7	7
Total assets	46,133	53,179
Current liabilities:
Accounts payable	1,022	1,461
Accrued expenses and other current liabilities	8,298	8,984
Operating lease obligations, current	260	0
Current liabilities of discontinued operations	23	115
Total current liabilities	9,603	10,560
Income tax payable, non-current	2,084	1,982
Operating lease obligations, non-current	277	0
Other non-current liabilities	168	150
Total liabilities	12,132	12,692
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.001 par value, 10,000 shares authorized; none issued or outstanding	0	0
Common stock, $0.001 par value, 20,000 and 10,000 shares authorized; 3,658 and 3,613 shares issued; 2,960 and 3,190 shares outstanding, respectively (a)	4	4
Additional paid-in capital	485,736	485,127
Accumulated deficit	(438,354)	(435,552)
Accumulated other comprehensive loss, net of applicable tax	(647)	(606)
Treasury stock, 698 and 423 shares, respectively, at cost (a)	(12,738)	(8,486)
Total stockholders' equity	34,001	40,487
Total liabilities and stockholders' equity	$ 46,133	$ 53,179