v3.8.0.1
CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
OPERATING ACTIVITIES      
Net loss $ (8,932) $ (6,572) $ (7,891)
Adjustments to reconcile net loss to net cash used in operating activities:      
Loss on sale of assets held for sale 0 0 38
Depreciation and amortization 2,405 1,902 1,854
Stock-based compensation 3,478 1,251 1,229
Research and development fee obligation 0 (889) 0
Changes in certain current assets and liabilities:      
Accounts receivable - trade (1,505) (280) (1,047)
Prepaid expenses and other current assets (598) (11) 30
Accounts payable - trade 1,952 1,544 1,354
Accrued expenses and other liabilities 258 1,675 810
Research and development fee obligation 0 (628) (541)
Other 135 0 0
Net cash used in operating activities (7,217) (1,119) (892)
INVESTING ACTIVITIES      
Proceeds from assets held for sale 0 0 539
Purchases of licenses (1,337) (406) (41)
Purchases of property and equipment (5,207) (4,348) (2,211)
Net cash used in investing activities (6,544) (4,754) (1,713)
FINANCING ACTIVITIES      
Proceeds from issuance of debt with affiliate 7,992 4,500 0
Proceeds from issuance of common stock, net of issuance costs 53,775 0 0
Payment of preferred stock dividends (5,965) 0 0
Shares surrendered by employees to pay taxes on restricted shares (990) 0 0
Payments on mortgage notes (78) (102) (98)
Payments of deferred offering costs 0 (794) 0
Net cash (used in) provided by financing activities 54,734 3,604 (98)
NET INCREASE (DECREASE) IN CASH 40,973 (2,269) (2,703)
Cash, beginning of year 1,609 3,878 6,581
Cash, end of period 42,582 1,609 3,878
SUPPLEMENTAL DISCLOSURES      
Cash paid for interest 2,490 1,476 1,230
Accretion of redeemable convertible preferred stock 4,563 5,876 4,797
Transfer of instruments from property and equipment to inventory 1,249 1,225 474
U.S.      
Changes in certain current assets and liabilities:      
Inventories / Inventories held by international distributors (4,287) (1,029) 1,623
International      
Changes in certain current assets and liabilities:      
Inventories / Inventories held by international distributors $ (123) $ 1,918 $ 1,649