CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 42,864	$ 5,580
Accounts receivable, less allowance for doubtful accounts of $58 and $69, respectively	13,675	11,545
Prepaid and other	791	388
Current assets of discontinued operations	0	79,530
Total current assets	57,330	97,043
Deferred tax assets, non-current	300	324
Other assets, non-current	340	372
Non-current assets of discontinued operations	0	13,901
Total assets	57,970	111,640
Current liabilities:
Accounts payable	1,780	1,193
Accrued expenses and other current liabilities	7,488	7,259
Current liabilities of discontinued operations	1,857	51,952
Total current liabilities	11,125	60,404
Income tax payable, non-current	1,973	1,682
Other non-current liabilities	894	192
Non-current liabilities of discontinued operations	0	6,210
Total liabilities	13,992	68,488
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, 100,000 shares authorized; issued 35,412 and 34,959 shares, respectively	34	34
Additional paid-in capital	484,254	483,558
Accumulated deficit	(432,698)	(443,419)
Accumulated other comprehensive income, net of applicable tax	185	10,709
Treasury stock, 3,834 and 3,800 shares, respectively, at cost	(7,797)	(7,730)
Total stockholders' equity	43,978	43,152
Total liabilities and stockholders' equity	$ 57,970	$ 111,640