Number of warrants exercised.

No definition available.

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- Definition

Warrant expiration period.

+ References

No definition available.

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644

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- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

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- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

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- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

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- Definition

The cash inflow associated with the amount received from holders exercising their stock warrants.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
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Amount of noncash expense for share-based payment arrangement.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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

Number of shares issued during the period as a result of an employee stock purchase plan.

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Expiration date of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in YYYY-MM-DD format.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Stock-Benefit Plans and Equity Transactions - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended		12 Months Ended
	Dec. 31, 2017	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2017	May 31, 2020	Jun. 30, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants outstanding		19,654,000
Stock-based compensation		$ 10,184,000	$ 4,474,000
Mr. Miles
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant expiration period	5 years
Number of warrants exercised		0
Number of warrants issued (in shares)	1,327,000			1,327,000
Exercise price of warrants	$ 5.00			$ 5.00
Stock-based compensation				$ 1,400,000
Safe Op Surgical Inc
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant expiration period		5 years
Proceeds from exercise of warrant			$ 100,000
Number of warrants exercised		0	1,000,000
Warrants outstanding		1,195,000
Number of warrants issued (in shares)		2,200,000
Exercise price of warrants		$ 3.50
2017 PIPE Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant expiration period		5 years
Proceeds from exercise of warrant		$ 900,000	$ 300,000
Number of warrants exercised		425,000	145,000
Warrants outstanding		1,887,000
Exercise price of warrants		$ 2.00
2018 Common Stock Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant expiration period		5 years
Proceeds from exercise of warrant		$ 400,000	$ 300,000
Number of warrants exercised		126,000	2,148,000
Warrants outstanding		8,354,000
Exercise price of warrants		$ 3.50
Squadron Medical \| Participant Lender
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of warrants exercised		0
Warrants outstanding					6,760,000
Number of warrants issued (in shares)					1,076,000	4,839,000	845,000
Exercise price of warrants					$ 4.88	$ 2.17	$ 3.15
Warrants And Rights Outstanding Maturity Date					May 29, 2027
RSU's and PRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized compensation expense		$ 57,900
Unamortized compensation expense to be recognized over weighted average period		1 year 9 months 21 days
Shares of common stock issued before net settlement		1,225,000	473,000
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued under ESPP		0	0