Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current Assets
Cash and cash equivalents	$ 23,302	$ 21,061
Short-term investments	9,973	51,790
Accounts receivable, net	5,669	8,560
Inventories	20,091	10,941
Interest receivable	30	26
Other current assets	10,240	9,205
Total Current Assets	69,305	101,583
Restricted cash	712	590
Property and equipment, net	5,782	6,337
Goodwill	79,904	80,131
Other long term assets	2,818	203
Total Assets	203,378	239,307
Current Liabilities
Accounts payable	7,039	4,433
Accrued expenses	8,182	9,619
Deferred revenue – current portion	897	1,733
Contingent consideration – current portion	74	72
Deferred consideration - MST Acquisition	6,310	5,962
Total Current Liabilities	22,502	21,819
Long Term Liabilities
Deferred revenue – less current portion	68	109
Contingent consideration – less current portion	12,521	10,565
Notes payable – net of debt discount	29,528	28,937
Warrant liabilities	2,214	4,636
Net deferred tax liabilities	3,164	4,720
Other long term liabilities	1,894	0
Total Liabilities	71,891	70,786
Commitments and Contingencies (Note 17)
Stockholders’ Equity
Common stock $0.001 par value, 750,000,000 shares authorized at June 30, 2019 and December 31, 2018; 217,625,492 and 216,345,984 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively	217	216
Additional paid-in capital	682,736	676,373
Accumulated deficit	(552,095)	(509,406)
Accumulated other comprehensive income	629	1,338
Total Stockholders’ Equity	131,487	168,521
Total Liabilities and Stockholders’ Equity	203,378	239,307
Intellectual Property, Net
Current Assets
Intangible assets	34,190	39,716
In-Process Research and Development
Current Assets
Intangible assets	$ 10,667	$ 10,747