Debt instrument, debt default, interest rate in addition if there is a default.

No definition available.

Name:	cry_DebtInstrumentDebtDefaultInterestRate
Namespace Prefix:	cry_
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Balance Type:	na
Period Type:	instant

- Definition

Line of credit facility, liquidity requirement after giving effect to stock repurchase.

+ References

No definition available.

+ Details

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Namespace Prefix:	cry_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

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

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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://www.xbrl.org/2003/role/presentationRef
-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=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-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

+ Details

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

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

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

- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.9)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

+ Details

Name:	us-gaap_InterestExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
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

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

- 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 borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Definition

The noncurrent cash, cash equivalents and investments that is restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits classified as long-term; that is not expected to be released from such existing restrictions within one year of the balance sheet date or operating cycle, whichever is longer. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. Includes noncurrent cash equivalents and investments that are similarly restricted as to withdrawal, usage or disposal.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
Period Type:	instant

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LoansPayableMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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- Details

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- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Debt (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
Debt (Narrative) (Details) - USD ($)	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jan. 20, 2016	Dec. 31, 2015
Line of Credit Facility [Line Items]
Term loan balance	$ 74,532,000		$ 74,532,000
Interest expense	797,000	$ 30,000	1,514,000	$ 60,000
GE Credit Agreement [Member]
Line of Credit Facility [Line Items]
Credit facility, aggregate amount	$ 20,000,000		$ 20,000,000
Credit facility, maturity date			Sep. 26, 2019
Credit facility, aggregate interest rate						4.75%
Credit facility, outstanding balance						$ 0
Credit facility, remaining availability						20,000,000
Amended Debt Agreement [Member]
Line of Credit Facility [Line Items]
Credit facility, aggregate interest rate	3.50%		3.50%
On-X Agreement [Member] \| Amended Debt Agreement [Member] \| Term Loan [Member]
Line of Credit Facility [Line Items]
Term loan balance	$ 75,000,000		$ 75,000,000
Credit facility, maturity date			Jan. 20, 2021
Minimum [Member] \| GE Credit Agreement [Member]
Line of Credit Facility [Line Items]
Credit facility, liquidity requirement after effect to stock repurchase			$ 20,000,000
Credit facility, restriction on cash and cash equivalents						$ 5,000,000
Senior Secured Credit Facility [Member] \| On-X Agreement [Member] \| Amended Debt Agreement [Member]
Line of Credit Facility [Line Items]
Aggregate principal amount					$ 95,000,000
Credit facility, default interest rate	2.00%		2.00%
Senior Secured Credit Facility [Member] \| Minimum [Member] \| On-X Agreement [Member] \| Amended Debt Agreement [Member] \| Base Rate [Member]
Line of Credit Facility [Line Items]
Credit facility, margin			1.75%
Senior Secured Credit Facility [Member] \| Minimum [Member] \| On-X Agreement [Member] \| Amended Debt Agreement [Member] \| LIBOR [Member]
Line of Credit Facility [Line Items]
Credit facility, margin			2.75%
Senior Secured Credit Facility [Member] \| Maximum [Member] \| On-X Agreement [Member] \| Amended Debt Agreement [Member] \| Base Rate [Member]
Line of Credit Facility [Line Items]
Credit facility, margin			2.75%
Senior Secured Credit Facility [Member] \| Maximum [Member] \| On-X Agreement [Member] \| Amended Debt Agreement [Member] \| LIBOR [Member]
Line of Credit Facility [Line Items]
Credit facility, margin			3.75%
Revolving Credit Facility [Member] \| On-X Agreement [Member] \| Amended Debt Agreement [Member]
Line of Credit Facility [Line Items]
Credit facility, aggregate amount	$ 20,000,000		$ 20,000,000
Credit facility, commitment fee percentage			0.50%
Letter Of Credit Sub-Facility [Member] \| On-X Agreement [Member] \| Amended Debt Agreement [Member]
Line of Credit Facility [Line Items]
Credit facility, aggregate amount	4,000,000		$ 4,000,000
Swing-Line Sub-Facility [Member] \| On-X Agreement [Member] \| Amended Debt Agreement [Member]
Line of Credit Facility [Line Items]
Credit facility, aggregate amount	$ 3,000,000		$ 3,000,000
Swing-Line Sub-Facility [Member] \| Minimum [Member] \| On-X Agreement [Member] \| Amended Debt Agreement [Member] \| Base Rate [Member]
Line of Credit Facility [Line Items]
Credit facility, margin			1.75%
Swing-Line Sub-Facility [Member] \| Maximum [Member] \| On-X Agreement [Member] \| Amended Debt Agreement [Member] \| Base Rate [Member]
Line of Credit Facility [Line Items]
Credit facility, margin			2.75%