Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Summary of Significant Accounting Policies

Schedule of Cash and restricted cash

	December 31,
	2021		2020
	(in thousands)
Cash	$	1,242	$	1,026
Restricted cash		50		50
Total cash and restricted cash as shown in the consolidated statements of cash flows	$	1,292	$	1,076

Schedule of property, plant and equipment useful life

Leasehold improvements	Shorter of expected useful life or lease term
Furniture, machinery and equipment, computer equipment and software	3-7 years