Consolidated Balance Sheets - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 10,210,000	$ 27,544,000
Restricted cash	1,293,000	1,293,000
Accounts receivable, net	12,906,000	12,237,000
Prepaid expenses and other current assets	4,642,000	3,989,000
Total current assets	29,051,000	45,063,000
Property and equipment, net	11,815,000	15,559,000
Goodwill	1,943,000	16,768,000
Intangible assets, net	1,938,000	4,475,000
Other non-current assets	2,045,000	1,504,000
Total assets	46,792,000	83,369,000
Current liabilities
Accounts payable	2,699,000	2,826,000
Accrued expenses and other current liabilities	9,383,000	10,474,000
Capital lease obligations	1,249,000	1,416,000
Total current liabilities	13,331,000	14,716,000
Capital lease obligations, non-current	549,000	1,687,000
Other long-term liabilities	3,541,000	4,183,000
Total liabilities	17,421,000	20,586,000
Commitments and contingencies (Note 15)
Stockholders' equity
Convertible preferred stock, $0.001 par value - 10,000 shares authorized, no shares issued and outstanding at December 31, 2018 and December 31, 2017, respectively
Common stock, $0.001 par value - 142,857 shares authorized, 5,938 and 5,729 shares issued and outstanding at December 31, 2018 and December 31, 2017, respectively	6,000	6,000
Additional paid-in capital	295,116,000	291,163,000
Accumulated deficit	(264,713,000)	(227,704,000)
Accumulated other comprehensive loss	(1,038,000)	(682,000)
Total stockholders' equity	29,371,000	62,783,000
Total liabilities and stockholders' equity	$ 46,792,000	$ 83,369,000