Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 8,576	$ 18,664
Accounts receivable, net	129,881	48,039
Inventories	26,941	28,546
Prepaid expenses and other assets	2,675	10,400
Total current assets	168,073	105,649
Property, plant and equipment, net	101,620	103,286
Goodwill and other intangibles	10,523	10,523
Other assets	2,313	1,972
Total assets	282,529	221,430
Current liabilities:
Accounts payable	15,137	10,767
Accrued expenses and other liabilities	36,271	34,693
Accrued warranty	5,925	5,925
Line of credit	0	0
Total current liabilities	57,333	51,385
Deferred income taxes	894	894
Non-current accrued warranty	30,735	31,767
Other long-term liabilities	2,880	3,223
Total liabilities	91,842	87,269
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.01 par value, 3,000,000 shares authorized; none issued and outstanding
Common stock, $0.01 par value, 80,000,000 shares authorized; 34,899,586 and 34,894,233 shares issued and 29,405,905 and 29,400,552 shares outstanding at June 30, 2017 and December 31, 2016, respectively	349	349
Additional paid-in capital	119,876	120,082
Retained earnings	243,974	187,242
Treasury stock, at cost, 5,493,681 shares at June 30, 2017 and December 31, 2016	(173,512)	(173,512)
Total stockholders' equity	190,687	134,161
Total liabilities and stockholders' equity	$ 282,529	$ 221,430