Number of vote for each share of common stock.

No definition available.

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- Definition

Number of warrants that will expire.

+ References

No definition available.

+ Details

Name:	mass_NumberOfWarrantsThatWillExpire
Namespace Prefix:	mass_
Data Type:	xbrli:sharesItemType
Balance Type:	na
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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.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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=109259400&loc=d3e21475-112644

+ Details

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Balance Type:	na
Period Type:	instant

- 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

+ Details

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- Details

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Namespace Prefix:
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- Details

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Equity (Details)	12 Months Ended
Equity (Details)	Dec. 31, 2028 shares	Dec. 31, 2027 shares	Mar. 31, 2021 Vote $ / shares shares	Dec. 31, 2020 $ / shares shares
Equity
Number of vote for each share of common stock \| Vote			1
Warrants to purchase common stock
Equity
Outstanding warrants for the purchase of common stock			92,703	92,703
Exercise price \| $ / shares			$ 9.17	$ 9.17
Forecast \| Warrants to purchase common stock
Equity
Number of warrants that will expire	43,625	49,078