Revenues (Tables)

3 Months Ended

Mar. 31, 2019

Revenues [Abstract]

Disaggregation of Revenue by Geographic Region

	Three Months Ended
	March 31,
	2019		2018
United States
Product sales	$	19,564	$	13,577
Services		5,781		8,423
Total United States		25,345		22,000
Canada
Product sales		16,621		35,698
Services		8,375		11,477
Total Canada		24,996		47,175
Other Countries
Product sales		1,047		833
Services		1,462		678
Total Other Countries		2,509		1,511
Total
Product sales		37,232		50,108
Services		15,618		20,578
Total	$	52,850	$	70,686

Schedule of Contract Assets and Liabilities

	Contract Assets				Contract Liabilities
	Current		Non-Current		Current		Non-Current
Balance at January 1, 2019	$	—	$	—	$	515	$	—
Additions		—		—		68		—
Revenue recognized		—		—		(515)		—
Balance at March 31, 2019	$	—	$	—	$	68	$	—