Note

. Revenue Recognition

We design, manufacture, market, sell, and maintain quality control instruments and software, consumables, and services driven primarily by the regulatory requirements of niche markets. Our consumables, such as biological indicator test strips and packaging materials, are typically used on a standalone basis; however, some, such as calibration solutions, are also critical to the ongoing use of our instruments. Hardware and software sales, such as medical meters, wireless sensor systems, and data loggers are generally driven by our acquisition of new customers, growth of existing customers, or customer replacement of existing equipment. Hardware sales

may

be offered with perpetual or annual software licenses, which in some cases are required for the hardware to function. We evaluate our revenues internally both by product line as well as by timing of revenue generation and nature of goods and services provided. Typically, discrete revenue is recognized at the shipping point or upon completion of the service, while contracted revenue is recognized over a period of time reflective of the performance obligation period in the applicable contract.

Our performance obligations related to the sale of instruments and consumables generally consist of the promise to sell tangible goods to distributors or end users. Ownership of these goods is typically transferred at time of shipment, at which point we have satisfied our performance obligation and we recognize revenue.

Our performance obligations related to services

may

include testing, installation, and/or maintenance of our products, either on-site at our customers’ facilities or in our own calibration laboratories. Performance obligations arise from service contracts when discrete services are contracted in advance and performed at a future time, often at the time of the customer’s choosing. In this case, the performance obligation is satisfied, and revenue is recognized, upon the customer’s acceptance of the completion of the specified work. Alternatively, service revenue

may

be recognized for contracted services or maintenance provided continually over a period of time, and our performance obligations are satisfied by completing any service that is contractually required, if applicable, or simply by the passage of time if

services are required or requested. For contracted services, revenue is recognized on a straight-line basis over the life of the service contract, which is a faithful depiction of these annual service contracts, which

may

not

be invoked.

The following tables present disaggregated revenues for the years ended

March 31, 2019,

2018,

and

2017:

	Year Ended March 31, 2019
	Sterilization and Disinfection Control		Instruments		Cold Chain Monitoring		Cold Chain Packaging		Total
Discrete Revenues
Consumables	$	39,670	$	3,101	$	388	$	6,430	$	49,589
Hardware and Software		580		24,500		6,987		142		32,209
Services		1,209		8,524		2,001		335		12,069
Contracted Revenues
Services		4,838		--		4,430		--		9,268
Total Revenues	$	46,297	$	36,125	$	13,806	$	6,907	$	103,135

	Year Ended March 31, 2018
	Sterilization and Disinfection Control		Instruments		Cold Chain Monitoring		Cold Chain Packaging		Total
Discrete Revenues
Consumables	$	36,436	$	3,080	$	261	$	5,197	$	44,974
Hardware and Software		925		23,345		5,051		91		29,412
Services		1,110		7,679		2,017		549		11,355
Contracted Revenues
Services		4,789		--		5,649		--		10,438
Total Revenues	$	43,260	$	34,104	$	12,978	$	5,837	$	96,179

	Year Ended March 31, 2017
	Sterilization and Disinfection Control		Instruments		Cold Chain Monitoring		Cold Chain Packaging		Total
Discrete Revenues
Consumables	$	31,851	$	2,917	$	175	$	7,005	$	41,948
Hardware and Software		693		24,098		6,748		23		31,562
Services		1,351		7,390		2,848		1,013		12,602
Contracted Revenues
Services		4,740		--		2,813		--		7,553
Total Revenues	$	38,635	$	34,405	$	12,584	$	8,041	$	93,665

Contract Balances

Our contracts have varying payment terms and conditions. Some customers prepay for services, resulting in unearned revenues or customer deposits, called contract liabilities, which are included within other accrued expenses and unearned revenues in the accompanying Consolidated Balance Sheets. Contract assets would exist when sales are recorded (i.e. the control of the goods or services has been transferred to the customer), but customer payment is contingent on a future event besides the passage of time (such as satisfaction of additional performance obligations). We do

not

have any contract assets. Unbilled receivables, which are

not

classified as contract assets, represent arrangements in which sales have been recorded prior to billing and right to payment is unconditional.

A summary of contract liabilities is as follows:

Contract liabilities balance as of March 31, 2018	$	4,147
Prior year liabilities recognized in revenues during the year ended March 31, 2019		(4,629	)
Contract liabilities added during the year ended March 31, 2019, net of revenues recognized		4,908
Contract liabilities balance as of March 31, 2019	$	4,426