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BALANCE SHEET DETAILS (Tables)

12 Months Ended

Dec. 31, 2021

Balance Sheet Related Disclosures [Abstract]

Schedule of Inventories

The following tables provide details of selected balance sheet items:

		December 31,				December 31,
		2021				2020
		(in thousands)
Inventories:
Raw materials		$	563			$	3,328
Work in process			39				1,766
Finished goods(1)			935				1,601
Total Inventory		$	1,537			$	6,695

(1)Includes finished goods at customer sites of approximately $0.1 million and $0.5 million at December 31, 2021 and 2020, respectively, for which the customer has taken possession, but based on specific contractual terms, title has not yet passed to the customer and for which revenue has not yet been recognized.

Schedule of Prepaid and Other Current Assets

		December 31,				December 31,
		2021				2020
		(in thousands)
Prepaid and other current assets
Prepaid tax (1)		$	1,295			$	1,736
Advance to suppliers			7				15
Other receivables			796				1,054
Prepaid and others (2)			2,713				2,303
Total Prepaid and other current assets		$	4,811			$	5,108

(1)2021 balance includes $0.1 million prepaid consumption tax, $0.9 million prepaid of value added tax, $0.01 million duty recoverable and $0.3 million goods and service tax. 2020 balance includes $0.1 million prepaid consumption tax, $0.8 million prepaid of value added tax, $0.5 million duty recoverable and $0.3 million goods and service tax.

(2)2021 balance includes $2.0 million interest receivable. 2020 balance includes $1.4 million interest receivable, $0.4 million prepaid of software and license

Schedule of Property, Plant and Equipment, Net

		December 31,				December 31,
		2021				2020
		(in thousands)
Property, plant and equipment, net:
Leasehold improvements		$	1,801			$	1,846
Automobiles			271				340
Computers and software			4,461				4,579
Equipment and furniture			22,240				23,906
Total			28,773				30,671
Less: accumulated depreciation			(28,171	)			(30,051	)
Total Property, plant and equipment, net		$	602			$	620

Schedule of Other Current Liabilities

		December 31,				December 31,
		2021				2020
		(in thousands)
Other current liabilities:
Warranty costs		$	53			$	54
Accrued professional fees			993				988
Accrued other taxes			36				376
Provision for LD			1,073				1,575
Contract deposits			349				343
Others			869				709
Total other current liabilities		$	3,373			$	4,045

Schedule of Other Long-term Liabilities

		December 31,				December 31,
		2021				2020
		(in thousands)
Other long-term liabilities
Non-current income tax payable		$	979			$	1,000
Other long-term liabilities			—				—
Total other long-term liabilities		$	979			$	1,000

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