Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
ASSETS
Cash and cash equivalents	$ 109,587	$ 137,686
Accounts receivable, net	4,935	3,803
Other current assets	3,125	2,640
Total current assets	117,647	144,129
Property and equipment, net	6,062	3,944
Intangible assets, net	7,651	6,666
Goodwill	17,847	13,074
Operating right-of-use lease assets	13,293
Other assets	1,704	1,684
Total assets	164,204	169,497
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	564	444
Accrued expenses	9,504	10,533
Contingent consideration liability	7,900	7,050
Current portion of debt, net	6,064	5,419
Operating lease liabilities	414
Total current liabilities	24,446	23,446
Long-term debt, net	37,568	39,180
Operating lease liabilities	14,787
Contingent consideration liability	4,000	3,950
Deferred tax liability	28	28
Other liabilities		1,818
Total liabilities	80,829	68,422
Commitments and Contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value Authorized - 20,000 shares; issued and outstanding - none	0	0
Common stock, $0.0013 par value Authorized - 160,000 shares; issued - 84,742 shares in 2019 and 2018	110	110
Additional paid-in capital	714,096	713,019
Treasury stock at cost, 200 shares of common stock	(2,741)	(2,741)
Accumulated other comprehensive loss	(147)	(105)
Accumulated deficit	(627,943)	(609,208)
Total stockholders’ equity	83,375	101,075
Total liabilities and stockholders’ equity	$ 164,204	$ 169,497