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Note 5 - Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]

		Estimated useful lives (years)					June 30 , 2019				December 31, 2018
Tradename		5	to	7			$	555			$	555
Patents and technological know-how			10					15,653				13,377
Proprietary software		3	to	15				2,981				2,981
Other		3	to	5				323				323
Total intangible assets								19,512				17,236
Accumulated amortization								(7,641	)			(6,987	)
Total intangible assets, net							$	11,871			$	10,249

Finite-lived Intangible Assets Amortization Expense [Table Text Block]

		Three months ended June 30,								Six months ended June 30,
		2019				2018				2019				2018
Amortization of intangible assets		$	(336	)		$	(265	)		$	(700	)		$	(513	)

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Years ending December 31,		Amount
2019 (Remainder)		$	656
2020			1,175
2021			1,175
2022			1,175
2023			1,168
Thereafter			6,522
Total			11,871