CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 28,383	$ 40,562
Accounts receivable, less allowance for doubtful accounts of $160 and $41, respectively	15,691	9,893
Prepaid and other	1,250	671
Current assets of discontinued operations	0	941
Total current assets	45,324	52,067
Property and equipment, net	189	170
Operating lease right-of-use assets	445	0
Deferred tax assets, non-current	808	583
Restricted cash, non-current	376	352
Other assets, non-current	7	7
Total assets	47,149	53,179
Current liabilities:
Accounts payable	1,484	1,461
Accrued expenses and other current liabilities	8,968	8,984
Operating lease obligations, current	241	0
Current liabilities of discontinued operations	0	115
Total current liabilities	10,693	10,560
Income tax payable, non-current	2,116	1,982
Operating lease obligations, non-current	210	0
Other non-current liabilities	172	150
Total liabilities	13,191	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; 3,660 and 3,613 shares issued; 2,939 and 3,190 shares outstanding, respectively (a)	4	4
Additional paid-in capital	485,938	485,127
Accumulated deficit	(437,990)	(435,552)
Accumulated other comprehensive loss, net of applicable tax	(985)	(606)
Treasury stock, 721 and 423 shares, respectively, at cost (a)	(13,009)	(8,486)
Total stockholders' equity	33,958	40,487
Total liabilities and stockholders' equity	$ 47,149	$ 53,179