Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 34,160	$ 46,666
Restricted cash	6,343	6,808
Accounts receivable - trade, net of allowance for credit losses of $17,058 as of March 31, 2022 and $17,735 as of December 31, 2021	78,950	86,114
Other receivables	9,898	10,621
Inventories	70,085	56,893
Contract assets	902	2,184
Prepaid expenses and other current assets	10,019	5,690
Total current assets	210,357	214,976
Property, plant and equipment, net	10,277	9,842
Right-of-use assets from operating leases	11,751	12,640
Goodwill	6,145	6,145
Intangible assets, net	4,820	5,115
Other assets	9,904	8,950
Total assets	253,254	257,668
Current liabilities:
Accounts payable - trade	63,774	64,258
Contract liabilities	8,506	6,091
Operating lease liabilities	3,927	4,097
Accrued and other liabilities	16,916	16,032
Total current liabilities	93,123	90,478
Contract liabilities - non-current	2,881	3,044
Operating lease liabilities - non-current	11,029	12,103
Pension liabilities	16,106	16,527
Other long-term liabilities	3,704	3,609
Total liabilities	126,843	125,761
Commitments and contingencies (Note 13)
Stockholders’ equity:
Common stock, 36,000 shares authorized, 27,603 and 27,505 shares issued and outstanding as of March 31, 2022 and December 31, 2021, respectively, at $0.001 par value	27	27
Preferred stock, $0.001 par value, 25,000 shares authorized and no shares issued and outstanding as of March 31, 2022 and December 31, 2021, respectively
Additional paid-in capital	226,163	223,336
Accumulated other comprehensive loss	(4,793)	(4,457)
Accumulated deficit	(94,986)	(86,999)
Total stockholders’ equity	126,411	131,907
Total liabilities and stockholders’ equity	$ 253,254	$ 257,668