CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and temporary investments	$ 56,199	$ 57,521
Accounts receivable, net of allowance for doubtful accounts of $1,348 and $1,295 at March 31, 2021 and December 31, 2020, respectively	167,694	141,642
Inventories, net	84,940	83,939
Prepaid expenses	6,552	3,167
Total current assets	315,385	286,269
NONCURRENT ASSETS:
Property, plant and equipment, net	98,734	98,620
Right-of-use assets - operating leases	1,431	1,468
Goodwill	11,619	11,619
Other assets	491	434
TOTAL ASSETS	427,660	398,410
CURRENT LIABILITIES:
Accounts payable	113,351	85,534
Accrued liabilities	24,166	24,773
Current portion of operating lease obligation	371	354
Current portion of finance lease obligation	22	21
Total current liabilities	137,910	110,682
NONCURRENT LIABILITIES
Noncurrent portion of operating lease obligation	1,061	1,116
Noncurrent portion of finance lease obligation	9	15
Deferred income tax liabilities	4,143	4,144
Total liabilities	143,123	115,957
COMMITMENTS AND CONTINGENCIES (Note 7)
SHAREHOLDERS' EQUITY:
Preferred stock, $0.01 par value; 5,000,000 shares authorized, none issued or outstanding
Common stock, $0.01 par value; 100,000,000 shares authorized, 11,410,728 and 11,405,468, outstanding at March 31, 2021 and December 31, 2020, respectively	114	114
Additional paid-in capital	151,449	151,249
Accumulated surplus	135,003	133,879
Accumulated other comprehensive loss	(2,029)	(2,789)
Total shareholders' equity	284,537	282,453
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 427,660	$ 398,410