Basis of Presentation and Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2020

Revenues Disaggregated by Major Good or Service Line, Timing of Revenue Recognition, and Sales Channel, Reconciled to Our Reportable Segments

The following tables presents our revenues disaggregated by major good or service line, timing of revenue recognition, and sales channel, reconciled to our reportable segments (in thousands).

	Three months ended June 30, 2020
	Reportable Segments
	Detection		Therapy		Total
Major Goods/Service Lines
Products	$	2,702	$	575	$	3,277
Service contracts		1,403		385		1,788
Supply and source usage agreements		—		490		490
Other		12		—		12
	$	4,117	$	1,450	$	5,567
Timing of Revenue Recognition
Goods transferred at a point in time	$	2,714	$	605	$	3,319
Services transferred over time		1,403		845		2,248
	$	4,117	$	1,450	$	5,567
Sales Channels
Direct sales force	$	2,709	$	805	$	3,514
OEM partners		1,408		—		1,408
Channel partners		—		645		645
	$	4,117	$	1,450	$	5,567

	Six months ended June 30, 2020
	Reportable Segments
	Detection		Therapy		Total
Major Goods/Service Lines
Products	$	5,802	$	1,921	$	7,723
Service contracts		2,750		732		3,482
Supply and source usage agreements		—		861		861
Professional services		—		11		11
Other		41		—		41
	$	8,593	$	3,525	$	12,118
Timing of Revenue Recognition
Goods transferred at a point in time	$	5,843	$	1,988	$	7,831
Services transferred over time		2,750		1,537		4,287
	$	8,593	$	3,525	$	12,118
Sales Channels
Direct sales force	$	4,881	$	2,274	$	7,155
OEM partners		3,712		—		3,712
Channel partners		—		1,251		1,251
	$	8,593	$	3,525	$	12,118

	Three months ended June 30, 2019
	Reportable Segments
	Detection		Therapy		Total
Major Goods/Service Lines
Products	$	3,808	$	1,050	$	4,858
Service contracts		1,354		475		1,829
Supply and source usage agreements		—		526		526
Professional services		—		8		8
Other		47		61		108
	$	5,209	$	2,120	$	7,329
Timing of Revenue Recognition
Goods transferred at a point in time	$	3,808	$	1,144	$	4,952
Services transferred over time		1,401		976		2,377
	$	5,209	$	2,120	$	7,329
Sales Channels
Direct sales force	$	2,863	$	1,701	$	4,564
OEM partners		2,346		—		2,346
Channel partners		—		419		419
	$	5,209	$	2,120	$	7,329

	Six months ended June 30, 2019
	Reportable Segments
	Detection		Therapy		Total
Major Goods/Service Lines
Products	$	6,598	$	2,569	$	9,167
Service contracts		2,676		991		3,667
Supply and source usage agreements		—		1,063		1,063
Professional services		—		41		41
Other		103		61		164
	$	9,377	$	4,725	$	14,102
Timing of Revenue Recognition
Goods transferred at a point in time	$	6,598	$	2,776	$	9,374
Services transferred over time		2,779		1,949		4,728
	$	9,377	$	4,725	$	14,102
Sales Channels
Direct sales force	$	4,974	$	3,513	$	8,487
OEM partners		4,403		—		4,403
Channel partners		—		1,212		1,212
	$	9,377	$	4,725	$	14,102

Summary of Receivables, Contract Assets and Contract Liabilities from Contracts with Customers

The following table provides information about receivables, contract assets, and contract liabilities from contracts with customers (in thousands).

Contract balances

	Balance at June 30, 2020
Receivables, which are included in ‘Trade accounts receivable’	$	6,658
Contract assets, which are included in “Prepaid and other current assets”		21
Contract liabilities, which are included in “Deferred revenue”		5,664

Summary of Changes in Deferred Revenue

Changes in deferred revenue from contracts with customers were as follows (in thousands):

	Six Months Ended
	June 30, 2020
Balance at beginning of period	$	5,604
Deferral of revenue		5,078
Recognition of deferred revenue		(5,018	)
Balance at end of period	$	5,664

Accounting Standards Update 2016-02 [Member]

Summary of Changes in Deferred Revenue

The balance of deferred revenue at June30, 2020 and December 31, 2019 is as follows (in thousands):  

Contract liabilities	June 30, 2020		December 31, 2019
Short term	$	5,466	$	5,248
Long term		198		356
Total	$	5,664	$	5,604