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Note 11 - Revenues (Tables)

6 Months Ended

Jun. 30, 2021

Notes Tables

Disaggregation of Revenue [Table Text Block]

		Three Months Ended June 30,								Six Months Ended June 30,
(in thousands)		2021				2020				2021				2020
Instruments, equipment, software and accessories		$	27,992			$	22,069			$	53,819			$	45,006
Service, maintenance and warranty contracts			1,205				1,239				2,367				2,073
Total revenues		$	29,197			$	23,308			$	56,186			$	47,079

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

		Three Months Ended June 30,								Six Months Ended June 30,
(in thousands)		2021				2020				2021				2020
United States		$	13,151			$	9,341			$	24,328			$	19,271
Europe			8,026				6,340				16,615				13,983
Asia			5,695				5,554				11,233				9,976
Rest of the world			2,325				2,073				4,010				3,849
Total revenues		$	29,197			$	23,308			$	56,186			$	47,079

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]

		Three Months Ended June 30, 2021
(in thousands)		Service Contracts				Customer Advances				Total
Balance at March 31, 2021		$	1,712			$	1,925			$	3,637
Deferral of revenue			988				322				1,310
Recognition of deferred revenue			(846	)			(433	)			(1,279	)
Effect of foreign currency translation			7				-				7
Balance at June 30, 2021		$	1,861			$	1,814			$	3,675
		Three Months Ended June 30, 2020
(in thousands)		Service Contracts				Customer Advances				Total
Balance at March 31, 2020		$	1,410			$	2,263			$	3,673
Deferral of revenue			1,177				121				1,298
Recognition of deferred revenue			(1,144	)			(145	)			(1,289	)
Effect of foreign currency translation			(30	)			-				(30	)
Balance at June 30, 2020		$	1,413			$	2,239			$	3,652

		Six Months Ended June 30, 2021
(in thousands)		Service Contracts				Customer Advances				Total
Balance at December 31, 2020		$	1,629			$	2,142			$	3,771
Deferral of revenue			2,239				663				2,902
Recognition of deferred revenue			(2,011	)			(991	)			(3,002	)
Effect of foreign currency translation			4				-				4
Balance at June 30, 2021		$	1,861			$	1,814			$	3,675
		Six Months Ended June 30, 2020
(in thousands)		Service Contracts				Customer Advances				Total
Balance at December 31, 2019		$	1,587			$	2,362			$	3,949
Deferral of revenue			1,485				344				1,829
Recognition of deferred revenue			(1,643	)			(467	)			(2,110	)
Effect of foreign currency translation			(16	)			-				(16	)
Balance at June 30, 2020		$	1,413			$	2,239			$	3,652

Financing Receivable, Allowance for Credit Loss [Table Text Block]

		Six Months Ended June 30,
(in thousands)		2021				2020
Balance, beginning of period		$	227			$	325
Bad debt (credit) expense			(17	)			4
Charge-offs and other recoveries			(62	)			(40	)
Effect of foreign currency translation			(3	)			1
Balance, end of period		$	145			$	290

X

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Tabular disclosure of allowance for credit loss on financing receivable.

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