XML 80 R58.htm IDEA: XBRL DOCUMENT v3.19.1

Deferred Compensation (Details) - Former Officers - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Minimum period of deferred compensation benefits	10 years
Minimum deferred compensation benefit age	65 years
Estimate of Fair Value
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Present value of vested future deferred compensation payments	$ 116,785	$ 159,080

X

- Definition

Deferred Compensation Arrangement with Individual, Allocated Share-based Compensation Expense, Minimum Benefit Age

+ References

No definition available.

+ Details

Name:	synl_DeferredCompensationArrangementWithIndividualAllocatedShareBasedCompensationExpenseMinimumBenefitAge
Namespace Prefix:	synl_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Deferred Compensation Arrangement with Individual, Minimum Contractual Term

+ References

No definition available.

+ Details

Name:	synl_DeferredCompensationArrangementWithIndividualMinimumContractualTerm
Namespace Prefix:	synl_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- 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

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

X

- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_TitleOfIndividualAxis=synl_FormerOfficersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: