Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Schedule of share repurchase activity

Periods	Total number of shares purchased		Average price paid per share		Total number of shares purchased as part of publicly announced program		Approximate dollar value of shares that may yet be purchased under the program (in thousands)
January 1, 2019 to January 31, 2019		300	$	8.00		300	$	2,933
February 1, 2019 to February 28, 2019		—				—		2,933
March 1, 2019 to March 31, 2019		3,699		7.90		3,699		2,903
Total		3,999

Summary of inventories

	March 31, 2019		December 31, 2018
	(in thousands)
Raw materials	$	468	$	468
Work-in-process		1,164		1,322
Finished goods		468		340
	$	2,100	$	2,130

Summary of property and equipment

	March 31, 2019		December 31, 2018
	(in thousands)
Raw materials	$	469	$	468
Work-in-process		1,193		1,322
Finished goods		468		340
	$	2,130	$	2,130