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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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