Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 9,039	$ 10,282
Accounts receivable - net (Note 5)	99,518	86,123
Inventories - net (Note 6)	142,714	124,504
Other current assets	7,752	5,763
Total current assets	259,023	226,672
Property, plant, and equipment - net (Note 7)	85,870	86,857
Operating lease right-of-use assets - net (Note 8)	13,116
Other assets:
Goodwill (Note 4)	19,422	19,258
Other intangibles - net (Note 4)	48,298	49,836
Other assets	488	626
TOTAL ASSETS	426,217	383,249
Current liabilities:
Accounts payable	90,419	78,269
Deferred revenue	14,168	6,619
Accrued payroll and employee benefits	7,598	12,993
Accrued warranty (Note 14)	1,715	2,057
Current portion of accrued settlement (Note 14)	8,000	10,000
Current maturities of long-term debt (Note 9)	609	629
Other accrued liabilities	14,964	13,624
Total current liabilities	137,473	124,191
Long-term debt (Note 9)	89,573	74,353
Deferred tax liabilities (Note 15)	5,142	5,287
Long-term portion of accrued settlement (Note 14)	40,000	40,000
Long-term operating lease liabilities (Note 8)	9,812	0
Other long-term liabilities	16,959	17,299
Stockholders' equity:
Common stock, par value $0.01, authorized 20,000,000 shares; shares issued at March 31, 2019 and December 31, 2018, 11,115,779; shares outstanding at March 31, 2019 and December 31, 2018, 10,404,347 and 10,366,007, respectively	111	111
Paid-in capital	47,400	48,040
Retained earnings	118,647	114,324
Treasury stock - at cost, 711,432 and 749,772 common stock shares at March 31, 2019 and December 31, 2018, respectively	(17,196)	(18,165)
Accumulated other comprehensive loss	(21,704)	(22,191)
Total stockholders' equity	127,258	122,119
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 426,217	$ 383,249