Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 50,172	$ 23,201
Short-term investments	1,997	22,520
Accounts receivable	42,507	35,074
Inventories	19,809	16,000
Contract assets	8,784	8,235
Prepaid expenses and other current assets	1,851	3,416
Total current assets	125,120	108,446
Property and equipment, net	22,547	15,961
Operating lease right-of-use assets	4,881	5,463
Other assets	3,026	2,881
Total Assets	155,574	132,751
Current Liabilities:
Accounts payable	18,016	12,905
Accrued expenses and other liabilities	22,846	17,772
Long-term debt, current portion	6,415
Deferred revenue	3,277	1,738
Total current liabilities	50,554	32,415
Long-term debt	34,358	40,395
Operating lease liabilities, long-term	4,940	5,441
Other long-term liabilities	481
Total liabilities	90,333	78,251
Stockholders’ Equity:
Preferred Stock: $0.01 par; 3,000 shares authorized, none outstanding
Common Stock: $0.01 par; 300,000 shares authorized; 166,672 and 165,221 issued and outstanding at September 30, 2020 and December 31, 2019, respectively	1,667	1,652
Additional paid-in capital	338,277	332,377
Accumulated deficit	(274,012)	(278,827)
Accumulated other comprehensive loss	(691)	(702)
Total Stockholders' Equity	65,241	54,500
Total Liabilities and Stockholders’ Equity	$ 155,574	$ 132,751