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L. SHARE-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of option activity

							Weighted						Weighted
				Weighted			Average						Average
				Average			Share Price			Weighted			Remaining		Aggregate
		Number of		Exercise			on Date of			Average			Contractual		Intrinsic
		shares		Price			Exercise			Fair Value			Life		Value
		(in thousands, except price data)
Outstanding, January 1, 2014		1,468		$	8.38						4.17				$	9,731
Granted		108			13.84						7.24					—
Exercised		(104)			6.22						2.57					1,476
Forfeited		(48)			8.23						5.43					628
Expired		(1)			6.21						2.21					11
Outstanding, December 31, 2014		1,423			8.96						4.48					3,486
Exercised		(81)			7.09		$	16.53			2.62					762
Forfeited		(32)			8.96						4.43					212
Outstanding, December 31, 2015		1,310			9.07						4.59					10,598
Exercised		(159)			6.91		$	19.90			2.56					2,071
Forfeited		(21)			7.96						3.29					273
Outstanding, December 31, 2016		1,130		$	9.40					$	4.90		6.412		$	15,872
Exercisable, December 31, 2016		877		$	9.18					$	4.78		6.333		$	12,499
Vested and expected to vest		1,122		$	9.39					$	4.90		6.409		$	15,767

Summary of RSU activity

				Weighted
				Average Share			Weighted			Aggregate
		Number of		Price on Date			Average Fair			Intrinsic
		shares		of Release			Value			Value
		(in thousands, except price data)
Outstanding at January 1, 2014		33						10.00
Granted		25						18.45
Released		(33)						10.57
Cancelled/Forfeited		(4)						18.20
Outstanding, December 31, 2014		21						18.22			238
Granted		156		$	13.62			11.06			1,722
Released		(19)						18.24			257
Cancelled/Forfeited		(6)						10.00			99
Outstanding, December 31, 2015		152						11.20			2,611
Granted		497						15.73			7,815
Released		(122)		$	13.50			14.08			1,644
Cancelled/Forfeited		(10)						15.38			180
Outstanding, December 31, 2016		517					$	14.79		$	12,128
Exercisable, December 31, 2016		25					$	11.41		$	575
Vested and expected to vest		501					$	14.77		$	11,752

Assumptions used

		2014
Expected volatility		52	%
Risk-free interest rate		1.89	%
Expected term (years)		6.25
Expected dividend yield		—
Estimated forfeitures		7.50	%

Schedule of employee stock-based compensation expenses

Share-Based compensation - by expense type

		2016			2015			2014
		(in thousands)
Cost of goods sold		$	190		$	70		$	88
Research and development			591			230			115
Sales and marketing			357			217			98
General and administrative			2,695			1,603			1,760
Total share-based compensation expense		$	3,833		$	2,120		$	2,061

Share-Based compensation - by award type

		2016			2015			2014
		(in thousands)
Employee stock options		$	1,460		$	1,538		$	1,660
Restricted stock units			2,373			582			385
Warrants			—			—			16
Total share-based compensation expense		$	3,833		$	2,120		$	2,061

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Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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