Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 1,767	$ 18,664
Accounts receivable, net	171,288	48,039
Inventories	30,109	28,546
Prepaid expenses and other assets	4,071	10,400
Total current assets	207,235	105,649
Property, plant and equipment, net	103,608	103,286
Goodwill and other intangibles	10,523	10,523
Other assets	1,940	1,972
Total assets	323,306	221,430
Current liabilities:
Accounts payable	13,643	10,767
Accrued expenses and other liabilities	31,108	34,693
Accrued warranty	5,925	5,925
Line of credit	77,000
Total current liabilities	127,676	51,385
Deferred income taxes	894	894
Non-current accrued warranty	30,757	31,767
Other long-term liabilities	3,045	3,223
Total liabilities	162,372	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; 34,895,162 and 34,894,233 shares issued and 29,401,481 and 29,400,552 shares outstanding at March 31, 2017 and December 31, 2016, respectively	349	349
Additional paid-in capital	118,906	120,082
Retained earnings	215,191	187,242
Treasury stock, at cost, 5,493,681 shares at March 31, 2017 and December 31, 2016	(173,512)	(173,512)
Total stockholders' equity	160,934	134,161
Total liabilities and stockholders' equity	$ 323,306	$ 221,430