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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Net Cash Provided by (Used in) Operating Activities [Abstract]    
Net income (loss) $ (46,689) $ (37,713)
Adjustments to reconcile net loss to net cash used in operating activities:    
Share-based compensation expense 2,531 2,392
(Gain) loss on change in fair value of SAFE and warrant liabilities 563 (105)
Bad debt expense and recoveries (27) 877
Depreciation of property, plant and equipment 3,806 2,979
Non-cash lease expense 1,679 1,565
Non-cash recognition of licensing revenue (2,022) (1,018)
Gain on extinguishment of debt (3,065) 0
Gain from equity method investees, net (1,945) (2,167)
Net foreign exchange loss 55 0
Changes in operating assets and liabilities:    
Accounts receivable, net 2,670 (4,470)
Contract assets (5,514) (5,605)
Other assets (941) (364)
Accounts payable and accrued salaries and wages 1,256 690
Contract liabilities 5,762 3,167
Operating lease liabilities (1,618) (1,204)
Other liabilities 908 1,705
Net cash used in operating activities (42,591) (39,271)
Cash Flows From Investing Activities:    
Purchase of property, plant and equipment (5,752) (7,110)
Proceeds from disposal of property, plant and equipment 5 4
Proceeds from disposal of investment property 0 513
Net cash used in investing activities (5,747) (6,593)
Cash Flows From Financing Activities:    
Proceeds from issue of equity instruments of the Company 83,831 46,572
Proceeds from exercise of a warrant 3,150 0
Proceeds from issue of SAFE and warrant instruments 30,000 0
Payments of Stock Issuance Costs 0 (30)
Proceeds from Issuance of Debt 0 3,065
Repurchase of equity instruments of the Company (396) 0
Repayment of borrowings (570) (4,880)
Net cash provided by financing activities 116,015 44,727
Net increase (decrease) in cash, cash equivalents and restricted cash 67,677 (1,137)
Cash, cash equivalents and restricted cash at beginning of period 60,909 62,117
Effects of currency translation on cash, cash equivalents and restricted cash 146 (71)
Cash, cash equivalents and restricted cash at end of period 128,732 60,909
Supplemental disclosure of cash flow information:    
Cash paid for interest 13 356
Cash paid for income taxes 0 0
Additional Cash Flow Elements, Investing Activities [Abstract]    
Acquisition of equity method investment in LanzaJet through contribution of license 0 15,000
Acquisition of property, plant and equipment under accounts payable 708 20
Supplemental disclosure of non-cash investing and financing activities:    
PPP loan forgiveness 3,065 0
Receipt of common shares as payment for option exercises $ 938 $ 0