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Interim Period Reporting (Details) $ / shares in Units, Devices in Thousands, $ in Thousands	1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	Aug. 31, 2017 USD ($) $ / shares shares	Mar. 31, 2017 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2010 Devices
Interim Period Reporting (Textual)
Number of equipment sold | Devices								61,000
Net loss			$ (964)	$ (998)	$ (1,657)	$ (1,871)
Accumulated deficit			$ (183,819)		(183,819)		$ (183,745)
Net cash used in operating activities					$ (1,431)	$ (3,033)
Shelf registration common stock offering price		$ 20,000
Shelf registration statement expiration date		Mar. 24, 2020
August 2017 Private Placement [Member]
Interim Period Reporting (Textual)
Issuance of common stock | shares							3,250,000
Share price | $ / shares							$ 2.00
Cash proceeds from warrants							$ 6,500
Securities Purchase Agreement [Member] | August 2017 Private Placement [Member]
Interim Period Reporting (Textual)
Issuance of common stock | shares	9,750,000
Net proceeds from issuance of common stock	$ 9,750
Share price | $ / shares	$ 1.00
Warrant expiration date	Aug. 09, 2020
Warrants to purchase shares of common stock | shares	3,250,001
Warrants purchase exercise price | $ / shares	$ 2.00
Aggregate purchase price of warrants	$ 9,750
Warrant exercisable, description	The 2017 Warrants will become exercisable on August 8, 2018, and will expire on August 9, 2020.
Warrants exercised value	$ 6,500

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