v3.21.2
CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Operating activities    
Net loss $ (14,835,000) $ (21,965,000)
Adjustments to reconcile net loss to net cash used by operating activities:    
Gain upon extinguishment of Payroll Protection Program Loan (1,528,000) 0
Depreciation and amortization 1,180,000 904,000
Stock-based compensation (371,000) 3,068,000
Changes in operating assets and liabilities:    
Accounts receivable 893,000 (1,289,000)
Due to/from related parties (638,000) (598,000)
Inventory (1,085,000) (2,688,000)
Prepaid expenses and other current assets 3,301,000 (1,118,000)
Accounts payable 1,254,000 (505,000)
Accrued expenses (555,000) (546,000)
Accrued compensation 143,000 (888,000)
Other 992,000 (26,000)
Net cash used by operating activities (11,249,000) (25,651,000)
Investing activities    
Sales and (purchases) of short-term investments, net 11,698,000 (29,942,000)
Purchases of land, buildings, and equipment (307,000) (525,000)
Net cash provided by (used by) investing activities 11,391,000 (30,467,000)
Financing activities    
Proceeds from Payroll Protection Program loan   1,518,000
Repayments of financing lease obligations (178,000) (130,000)
Proceeds from the exercise of stock options 227,000 0
Net cash provided by financing activities 49,000 1,388,000
Net increase (decrease) in cash, cash equivalents, and restricted cash 191,000 (54,730,000)
Cash, cash equivalents, and restricted cash - beginning of period 18,289,000 60,038,000
Cash, cash equivalents, and restricted cash – end of period $ 18,480,000 $ 5,308,000

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