SELECTED QUARTERLY INFORMATION (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

The following tables set forth certain data from the Company's consolidated statements of income for each of the quarters in the years ended December 31, 2018 and 2017.

The unaudited quarterly consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements contained herein and include all adjustments that the Company considers necessary for a fair presentation of such information when read in conjunction with the Company’s annual audited consolidated financial statements and notes thereto appearing elsewhere in this report. The operating results for any quarter are not necessarily indicative of the results for any subsequent period or for the entire fiscal year.

	Three Months Ended
	(unaudited)
	Dec. 31,		Sept. 30,		June 30,		Mar. 31,		Dec. 31,			Sept. 30,		June 30,		Mar. 31,
(in thousands, except per share data)	2018		2018		2018		2018		2017			2017		2017		2017
Net revenues	$	93,307	$	110,085	$	109,482	$	103,081	$	108,249		$	111,255	$	107,563	$	104,688
Gross profit	48,005		57,005		56,234		53,544		54,028			55,713		53,447		50,476
Net income (loss)(1)	$	22,736	$	17,667	$	15,381	$	14,200	$	(16,898	)	$	16,506	$	13,902	$	14,099
Earnings (loss) per share
Basic	$	0.78	$	0.60	$	0.52	$	0.48	$	(0.57	)	$	0.55	$	0.47	$	0.48
Diluted	$	0.77	$	0.59	$	0.51	$	0.46	$	(0.57	)	$	0.54	$	0.46	$	0.47
Shares used in per share calculation
Basic	29,164		29,365		29,505		29,799		29,759			29,759		29,720		29,456
Diluted	29,651		29,998		30,183		30,552		29,759			30,614		30,454		30,248

_______________

(1) In December 2017 the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (Refer to Note 11, Provision (Benefit) for Income Taxes, in the Notes to Consolidated Financial Statements).