SELECTED QUARTERLY INFORMATION

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

SELECTED QUARTERLY INFORMATION (Unaudited) [Text Block]

SELECTED QUARTERLY INFORMATION (Unaudited):

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, 2017 and 2016.

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)	2017			2017		2017		2017		2016		2016		2016		2016
Net revenues	$	108,249		$	111,255	$	107,563	$	104,688	$	102,436	$	101,625	$	97,571	$	88,036
Gross profit	54,028			55,713		53,447		50,476		50,076		49,842		47,785		44,488
Net income (loss)(1)	$	(16,898	)	$	16,506	$	13,902	$	14,099	$	14,303	$	12,809	$	11,407	$	10,379
Earnings (loss) per share
Basic	$	(0.57	)	$	0.55	$	0.47	$	0.48	$	0.49	$	0.44	$	0.40	$	0.36
Diluted	$	(0.57	)	$	0.54	$	0.46	$	0.47	$	0.48	$	0.43	$	0.39	$	0.35
Shares used in per share calculation
Basic	29,759			29,759		29,720		29,456		29,196		28,972		28,850		28,679
Diluted	29,759			30,614		30,454		30,248		29,914		29,625		29,422		29,244

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(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 for Income Taxes, in the Notes to Consolidated Financial Statements).