CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	[1]
Current assets:
Cash and cash equivalents	$ 9,167	$ 10,210
Restricted cash	971	1,293
Accounts receivable, net	9,258	12,906
Prepaid expenses and other current assets	3,949	4,642
Total current assets	23,345	29,051
Property and equipment, net	9,763	11,815
Right-of-use assets, operating leases	8,641	0
Goodwill	1,868	1,943
Intangible assets, net	470	1,938
Other non-current assets	1,508	2,045
Total assets	45,595	46,792
Current liabilities:
Accounts payable	1,908	2,699
Accrued expenses and other current liabilities	10,721	10,632
Operating lease liabilities	4,294	0
Total current liabilities	16,923	13,331
Operating lease liabilities, non-current	5,696	0
Other long-term liabilities	2,098	4,090
Total liabilities	24,717	17,421
Commitments and contingencies (Note 13)
Stockholders’ equity:
Common stock, $0.001 par value - 142,857 shares authorized, 6,642 and 5,938 shares issued and outstanding at September 30, 2019 and December 31, 2018, respectively	7	6
Additional paid-in capital	298,553	295,116
Accumulated deficit	(276,595)	(264,713)
Accumulated other comprehensive loss	(1,087)	(1,038)
Total stockholders’ equity	20,878	29,371
Total liabilities and stockholders’ equity	$ 45,595	$ 46,792

[1] Derived from the Company’s audited consolidated financial statements as of December 31, 2018.