Debt Covenant, Cash Collateral Requirement

No definition available.

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Namespace Prefix:	cfms_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The percentage points to be added to the fixed rate in effect on the debt instrument upon the occurrence and during the continuance of an event of default.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Capital Covenant, Minimum Gross Cash Proceeds

+ References

No definition available.

+ Details

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Namespace Prefix:	cfms_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Debt Instrument, Covenant, Events of Default Threshold

+ References

No definition available.

+ Details

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

- Definition

Debt Instrument, Covenant, Maximum Outstanding Indebtedness

+ References

No definition available.

+ Details

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Namespace Prefix:	cfms_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Covenant, Minimum Cash On Hand

+ References

No definition available.

+ Details

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Namespace Prefix:	cfms_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Debt Instrument, Number Of Principal And Interest Payments

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid, Percent of Loans Advanced

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Terms, Eligible Accounts Subject To Maximum Two Point Five Zero Percent Dilution, Percent

+ References

No definition available.

+ Details

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Namespace Prefix:	cfms_
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Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

The effective interest rate at the end of the reporting period.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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Balance Type:	debit
Period Type:	duration

- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Debt and Notes Payable (Details)			6 Months Ended
Debt and Notes Payable (Details)	Jun. 25, 2019 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Apr. 01, 2021 USD ($)	Jan. 01, 2021 USD ($)	Jul. 01, 2020 USD ($)	Apr. 17, 2020 USD ($) payment	Dec. 13, 2018 USD ($)	Jan. 06, 2017 USD ($)
Credit facility
Loss on extinguishment of debt				$ 0	$ (1,085,000)
Paycheck Protection Program Note
Credit facility
Interest rate stated percentage									1.00%
Debt instrument principal									$ 4,700,000
Number of payments \| payment									1
2017 Secured Loan Agreement \| Term loan
Credit facility
Principal amount										$ 30,000,000
Additional interest rate if event of default occurs (as a percent)	5.00%
2017 Secured Loan Agreement \| Term loan \| Oxford Term Loan
Credit facility
Amount drawn down		$ 15,000,000
Loss on extinguishment of debt	$ (1,100,000)
2017 Secured Loan Agreement \| Term loan \| Oxford Term Loan B
Credit facility
Maximum borrowing capacity											$ 15,000,000
2019 Secured Loan Agreement \| Term loan
Credit facility
Maximum borrowing capacity	$ 30,000,000
Margin rate (as a percent)	3.75%
Effective interest rate				9.25%
Final payment, percent of amount of loans advanced	5.00%
Credit facility term	4 years
Interest rate stated percentage	2.50%
Event of default, threshold amount	$ 500,000
2019 Secured Loan Agreement \| Term loan \| Prime Rate
Credit facility
Margin rate (as a percent)	5.50%
2019 Secured Loan Agreement \| Revolving Credit Facility
Credit facility
Maximum borrowing capacity	$ 10,000,000
Principal amount				$ 0
Margin rate (as a percent)	0.50%
Percent of eligible accounts subject to maximum 2.50% dilution	85.00%
2019 Secured Loan Agreement \| Revolving Credit Facility \| Prime Rate
Credit facility
Margin rate (as a percent)	5.50%
Minimum \| 2017 Secured Loan Agreement \| Term loan \| Oxford Term Loan
Credit facility
Cash collateral requirement										$ 5,000,000
Minimum \| 2019 Secured Loan Agreement \| Term loan
Credit facility
Event of default, threshold amount	$ 250,000
Subsequent Event \| 2019 Secured Loan Agreement \| Term loan
Credit facility
Minimum cash on hand								$ 5,000,000
Forecast \| Subsequent Event \| 2019 Secured Loan Agreement \| Term loan
Credit facility
Minimum cash on hand							$ 10,000,000
Minimum gross cash proceeds			$ 20,000,000.0
Maximum outstanding indebtedness						$ 5,000,000.0	$ 2,500,000.0