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Deferred Compensation Arrangement With Individual, Cash Awards Vested At Target Date, Percentage

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Deferred Compensation Arrangement With Individual, Maximum Amount

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Deferred Compensation Arrangement With Individual, Milestone Expiration Period After Target Date

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Deferred Compensation Arrangement With Individual, Milestone Received, Percentage

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Deferred Compensation Arrangement With Individual, Payment Period

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Deferred Compensation Arrangement With Individual, Reduction Of Milestone Award After Defined Target Date

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Amount of allowance for credit loss on accounts receivable.

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Amount of direct write-downs of accounts receivable charged against the allowance.

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For each balance sheet presented, the amount of accumulated amortization for capitalized computer software costs.

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Amount of expense for amortization of capitalized computer software costs.

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The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current.

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit.

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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).

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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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.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer.

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Summary of Significant Accounting Policies (Narrative) (Details)		3 Months Ended									12 Months Ended
	Oct. 25, 2019 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) segment	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jan. 01, 2019 USD ($)
Related Party Transaction [Line Items]
Allowance for doubtful accounts		$ 0	$ 0			$ 0	$ 0				$ 0	$ 0
Write-offs		0				0					0	0	$ 0
Capitalized software, net		3,100,000	2,400,000				1,300,000				2,400,000	1,300,000
Capitalized software, accumulated amortization			5,300,000			5,500,000	5,000,000.0				5,300,000	5,000,000.0
Capitalized software, amortization expense		200,000				200,000					800,000	500,000	600,000
Long-lived assets, impairment charges											$ 0	0	0
Operating segments \| segment											1
Reportable segments \| segment											1
Revenue		238,000	529,000	$ 832,000	$ 638,000	1,782,000	1,287,000	$ 386,000	$ 669,000	$ 507,000	$ 3,781,000	2,849,000	1,754,000
Unbilled receivables			0								0			$ 200,000
Contract assets			0								0
Deferred revenue		0	$ 0								0
Maximum amount of cash award											$ 30,000,000.0
Cash award, target date milestone, vesting percentage											50.00%
Cash award, one year anniversary milestone, vesting percentage											50.00%
Cash award, expiration period after defined target date											6 months
Cash award, reduction of milestone award after defined target date											0.5
Milestone percentage, received by each participant			100.00%								100.00%
Cash award, compensation expense	$ 9,900,000
Cash incentive plan, accrual		$ 0	$ 0				$ 0				$ 0	$ 0
Customer Concentration Risk \| One Customer \| Revenue
Related Party Transaction [Line Items]
Concentration risk, percentage		100.00%
Customer Concentration Risk \| One Customer \| Accounts Receivable
Related Party Transaction [Line Items]
Concentration risk, percentage		15.00%
Customer Concentration Risk \| Two Customers \| Revenue
Related Party Transaction [Line Items]
Concentration risk, percentage											100.00%
Customer Concentration Risk \| Two Customers \| Accounts Receivable
Related Party Transaction [Line Items]
Concentration risk, percentage											42.00%
Deferred bonus
Related Party Transaction [Line Items]
Days to receive bonus pool allocation												60 days
Stock option
Related Party Transaction [Line Items]
Vesting period											4 years
Expiration period											10 years
Restricted stock units
Related Party Transaction [Line Items]
Vesting period											4 years
Spaceflight operations
Related Party Transaction [Line Items]
Revenue		$ 0				800,000					$ 800,000	$ 800,000	0
Engineering services
Related Party Transaction [Line Items]
Revenue		200,000				800,000					2,800,000	1,200,000	1,000,000.0
Sponsorship revenue
Related Party Transaction [Line Items]
Revenue		$ 0				$ 200,000					$ 200,000	$ 800,000	$ 800,000
Capitalized software
Related Party Transaction [Line Items]
Useful life											3 years