Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF CASH FLOWS

v3.22.4
CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Operating activities      
Net loss $ (16,891) $ (29,199) $ (44,836)
Adjustments to reconcile net loss to net cash used by operating activities:      
Gain upon extinguishment of Payroll Protection Program Loan 0 (1,528) 0
Depreciation and amortization 1,534 2,338 1,869
Stock-based compensation 3,998 2,090 4,971
Unrealized (gain) loss on mark-to-market of common stock warrants (5,120) 0 0
Changes in operating assets and liabilities:      
Accounts receivable 0 4,887 (3,765)
Due to/from related parties 3 (594) (211)
Inventory 0 1,383 1,211
Prepaid expenses and other current assets 389 3,331 (3,122)
Accounts payable (229) (360) (148)
Accrued expenses (166) (2,542) 347
Accrued compensation (2,415) 572 (231)
Other (467) 811 243
Net cash used by operating activities (19,364) (18,811) (43,672)
Investing activities      
Sales and (purchases) of short-term investments, net 0 11,698 (11,698)
Purchases of land, buildings, and equipment (1,520) (497) (1,786)
Net cash (used) provided by investing activities (1,520) 11,201 (13,484)
Financing activities      
Proceeds from common stock issuance 11,538 4,380 15,000
Costs incurred related to the issuance of stock (1,173) (501) (963)
Proceeds from Payroll Protection Program loan 0 0 1,518
Repayments of financing lease obligations (376) (364) (360)
Proceeds from the exercise of stock options 0 227 212
Net cash provided by financing activities 9,989 3,742 15,407
Net decrease in cash, cash equivalents, and restricted cash (10,895) (3,868) (41,749)
Cash, cash equivalents and restricted cash - beginning of period 14,421 18,289 60,038
Cash, cash equivalents and restricted cash - end of period $ 3,526 $ 14,421 $ 18,289