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DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of Warranty Liability - (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Changes in the carrying amount of the total product warranty liability
Balance, beginning of period	$ 581	$ 671
Addition to (reduction of) warranty reserve	(350)	(28)
Warranty claims	(5)	(62)
Balance, end of period	$ 226	$ 581
Minimum
Warranty Liability
Term of warranty	1 year
Maximum
Warranty Liability
Term of warranty	5 years

X

- Definition

Represents the term of warranty.

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No definition available.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 7
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- Definition

Amount of decrease in the standard and extended product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard and extended product warranty.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
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Amount of increase (decrease) in the standard and extended product warranty liability.

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-Section 50
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