Summary of significant accounting policies (Details Textual) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2017 |
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| Cash and Cash Equivalents | $ 30,154 | $ 14,817 | $ 9,632 |
| Impairment charges on assets held for sale | $ 350 | ||
| Description of vesting period | (generally vesting either ratably over the first four years or on a tier basis of 50% on the second anniversary of the effective date and 25% on the third and fourth anniversary dates). | ||
| Maximum [Member] | Property, Plant and Equipment [Member] | |||
| Estimated useful lives | 11 years | ||
| Minimum [Member] | Property, Plant and Equipment [Member] | |||
| Estimated useful lives | 2 years | ||
| Patents [Member] | |||
| Useful lives | 15 years | ||
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Description of terms of award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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