v3.10.0.1
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
OPERATING ACTIVITIES    
Net loss $ (9,557) $ (4,087)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 2,177 1,748
Stock-based compensation 2,899 1,081
Changes in certain current assets and liabilities:    
Accounts receivable - trade (4,077) (1,588)
Prepaid expenses and other current assets (214) (382)
Accounts payable - trade 408 1,559
Accrued expenses and other liabilities 798 513
Other (15) 193
Net cash used in operating activities (12,855) (3,894)
INVESTING ACTIVITIES    
Purchases of licenses (195) (1,337)
Purchases of property and equipment (5,311) (3,949)
Net cash used in investing activities (5,506) (5,286)
FINANCING ACTIVITIES    
Proceeds from issuance of debt with affiliate 0 10,139
Payments on mortgage notes (84) (80)
Proceeds from exercise of stock options 326 0
Payments of deferred offering costs 0 (250)
Net cash (used in) provided by financing activities 242 9,809
NET (DECREASE) INCREASE IN CASH (18,119) 629
Cash, beginning of year 42,582 1,609
Cash, end of period 24,463 2,238
SUPPLEMENTAL DISCLOSURES    
Cash paid for interest 1,722 1,856
Accretion of redeemable convertible preferred stock 0 4,364
Transfer of instruments from property and equipment to inventory 1,061 1,196
U.S.    
Changes in certain current assets and liabilities:    
Inventories (6,087) (3,276)
International    
Changes in certain current assets and liabilities:    
Inventories $ 813 $ 345