Note 13 - Accrued Liabilities (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

Other Current Liabilities [Table Text Block]

	As of
	March 31, 2021		December 31, 2020
Contract liabilities (Note 3)	$	787	$	850
Accrued remediation contingency (Note 14)		50		176
Other accrued liabilities		743		1,073
Total other accrued liabilities	$	1,580	$	2,099