Cumulative Change In Owership Related To Percentage Points

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

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

+ References

No definition available.

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws without expiration .

+ References

No definition available.

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- Definition

Percentage Points Related To Ownership Change

+ References

No definition available.

+ Details

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- Definition

Rolling Period Duration Of Ownership Change

+ References

No definition available.

+ Details

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- Definition

Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due. This amount is the total of current and noncurrent accrued income taxes.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

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

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

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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- Definition

The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ 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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Income taxes - Other (Details) - USD ($)	12 Months Ended
Income taxes - Other (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes
Valuation allowance	$ 54,137,000	$ 44,033,000
Increase (decrease) in Valuation allowance	10,100,000
Net operating loss (NOL) carryforwards	$ 174,800,000
Tax credit carryforwards			$ 4,300,000
Cumulative change in ownership related to percentage points	5.00%
Percentage Points Related To Ownership Change	50.00%
Rolling Period Duration Of Ownership Change	3 years
Tax reserves accrued for uncertain tax positions	$ 0	0	0
Accrued interest or penalties	0	0	0
Federal
Income Taxes
Operating Loss Carryforwards, Subject To Expiry			108,500,000
Operating Loss Carryforwards, Not Subject To Expiry			$ 66,300,000
Federal \| Through Tax Year 2039 [Member]
Income Taxes
Tax credit carryforwards	4,300,000
State
Income Taxes
Tax credit carryforwards	$ 1,600,000
State \| Through Tax Year 2039 [Member]
Income Taxes
Net operating loss (NOL) carryforwards		$ 111,900,000