Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Company's revenues

The Company's revenues are derived from Product and related sales and RefrigerantSide® Services revenues. The revenues for each of these lines are as follows:

Years Ended December 31,	2018		2017		2016
(in thousands)
Product and related sales	$	162,229	$	136,016	$	101,344
RefrigerantSide ® Services		4,296		4,364		4,137
Total	$	166,525	$	140,380	$	105,481

Reconciliation of shares used to determine net income per share

The reconciliation of shares used to determine net income per share is as follows (dollars in thousands):

	Years  ended December 31,
	2018			2017		2016
Net income (loss)	$	(55,659	)	$	11,157	$	10,637
Weighted average number of shares – basic		42,484,972			41,764,230		34,104,476
Shares underlying options		—			1,002,613		1,312,434
Weighted average number of shares outstanding – diluted		42,484,972			42,766,843		35,416,910