Cumulative Loss Period

No definition available.

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- Definition

Deferred tax asset realized income tax benefit.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Income Tax Disclosure [Line Items]

+ References

No definition available.

+ Details

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- Definition

Operating Loss Carryforward Related To Exercise Of Employee Stock

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Amount, before allocation of a valuation allowances, of deferred tax assets attributable to deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible tax credit carryforwards.

+ References

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Tax year that remains open to examination under enacted tax laws, in CCYY format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Period Type:	instant

- Definition

Expiration date of each operating loss carryforward included in operating loss carryforward, in CCYY-MM-DD format.

+ References

+ Details

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Data Type:	xbrli:dateItemType
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- Definition

Expiration date of the tax credit carryforward, in CCYY-MM-DD format.

+ References

+ Details

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- Definition

Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Period Type:	instant

- Definition

The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Balance Type:	credit
Period Type:	instant

- Definition

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

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Period Type:	duration

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- Details

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Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
Income Taxes (Narrative) (Details) - USD ($)	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Line Items]
Tax credit carry-forwards	$ 5,804,000	$ 6,776,000
U.S. deferred tax assets realized as benefits	$ 0	0	$ 0
Cumulative loss period	3 years
Unrecognized tax benefits and reserves for uncertain tax positions that would impact effective tax rate	$ 482,000	234,000
Accrued interest or penalties related to uncertain tax positions	$ 261,000
Earliest Tax Year [Member] \| German Tax Authority [Member]
Income Tax Disclosure [Line Items]
Open tax year	2016
Earliest Tax Year [Member] \| China Tax Authority [Member]
Income Tax Disclosure [Line Items]
Open tax year	2017
Latest Tax Year [Member] \| German Tax Authority [Member]
Income Tax Disclosure [Line Items]
Open tax year	2020
Latest Tax Year [Member] \| China Tax Authority [Member]
Income Tax Disclosure [Line Items]
Open tax year	2020
Internal Revenue Service (IRS) [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforward	$ 31,400,000
Operating loss carryforward related to exercise of employee stock options	8,300,000
Increase (decrease) in valuation allowance	717,000	$ (131,000)
Internal Revenue Service (IRS) [Member] \| Tax Years 2021 Through 2035 [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforward	$ 28,100,000
Internal Revenue Service (IRS) [Member] \| Tax Years 2021 Through 2035 [Member] \| Minimum [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforward, expiration date	Jun. 30, 2021
Internal Revenue Service (IRS) [Member] \| Tax Years 2021 Through 2035 [Member] \| Maximum [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforward, expiration date	Jun. 30, 2035
Internal Revenue Service (IRS) [Member] \| Indefinite Period [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforward	$ 3,300,000
Internal Revenue Service (IRS) [Member] \| Tax Years 2021 Through 2034 [Member]
Income Tax Disclosure [Line Items]
Tax credit carry-forwards	$ 4,100,000
Internal Revenue Service (IRS) [Member] \| Tax Years 2021 Through 2034 [Member] \| Minimum [Member]
Income Tax Disclosure [Line Items]
Tax credit carryforward, expiration date	Jun. 30, 2021
Internal Revenue Service (IRS) [Member] \| Tax Years 2021 Through 2034 [Member] \| Maximum [Member]
Income Tax Disclosure [Line Items]
Tax credit carryforward, expiration date	Jun. 30, 2034
Internal Revenue Service (IRS) [Member] \| Earliest Tax Year [Member]
Income Tax Disclosure [Line Items]
Open tax year	2017
Internal Revenue Service (IRS) [Member] \| Latest Tax Year [Member]
Income Tax Disclosure [Line Items]
Open tax year	2020