XML 98 R86.htm IDEA: XBRL DOCUMENT v3.22.1
INCOME TAXES - Summary of Components of Net Deferred Tax Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Deferred Tax Assets    
Allowance and reserves $ 3,811 $ 5,681
Prepaid expense   93
Net operating loss carryforward 167,844 166,297
Tax credit carryforwards 6,451 6,881
Writedown/amortization of intangible assets and goodwill   1
Property, plant and equipment 396 815
Stock-based compensation 29 74
Accrued warranties 12 12
Other 14,052 13,874
Total deferred tax assets 192,595 193,728
Deferred Tax Liabilities    
Deferred revenue and customer advances, net (88) (204)
Prepaid expense (42)  
Total deferred tax liabilities (130) (204)
Total net deferred tax assets 192,465 193,524
Less: Valuation allowance (190,334) (189,253)
Total net deferred tax assets $ 2,131 $ 4,271