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LONG-TERM BORROWINGS (Details) | 1 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 30, 2016 USD ($) shares $ / shares | Jan. 31, 2015 USD ($) shares $ / shares | Apr. 29, 2018 USD ($) | Oct. 29, 2017 USD ($) | Mar. 31, 2011 USD ($)
Long-term borrowings [Abstract] |  |  |  |  |
Long-term debt and capital lease obligations |  |  | $ 59,263,000 | $ 61,976,000 |
Current portion |  |  | (59,263,000) | (4,639,000) |
Long-term debt and capital lease obligations non current |  |  | $ 0 | 57,337,000 |
Credit Facility [Member] |  |  |  |  |
Long-term borrowings [Abstract] |  |  |  |  |
Maturity date of debt |  |  | Dec. 31, 2018 |  |
Current borrowing capacity |  |  | $ 50,000,000 |  |
Maximum borrowing capacity |  |  | 75,000,000 |  |
Amount outstanding under credit facility |  |  | 0 |  |
Available borrowing capacity |  |  | $ 50,000,000 |  |
Interest rate |  |  | 3.62% |  |
3.25% Convertible Senior Notes due on April 2019 [Member] |  |  |  |  |
Long-term borrowings [Abstract] |  |  |  |  |
Convertible debt |  |  | $ 57,395,000 | 57,337,000 |
Face amount of debt |  |  | $ 57,500,000 |  |
Interest rate percentage |  |  | 3.25% |  |
Maturity date of debt |  |  | Apr. 01, 2019 |  |
Number of shares each note is convertible to (in shares) | shares |  | 96 |  |  |
Face amount of each note converted |  | $ 1,000 |  |  |
Conversion price per share (in dollars per share) | $ / shares |  | $ 10.37 |  |  |
3.25% Convertible Senior Notes due in April 2016 [Member] |  |  |  |  |
Long-term borrowings [Abstract] |  |  |  |  |
Face amount of debt |  |  |  |  | $ 57,500,000
Interest rate percentage | 3.25% |  |  |  |
Maturity date of debt | Apr. 01, 2016 |  |  |  |
Number of shares each note is convertible to (in shares) | shares | 96 |  |  |  |
Face amount of each note converted | $ 1,000 |  |  |  |
Conversion price per share (in dollars per share) | $ / shares | $ 10.37 |  |  |  |
2.77% Capital Lease Obligation Payable through July 2018 [Member] |  |  |  |  |
Long-term borrowings [Abstract] |  |  |  |  |
Long-term debt and capital lease obligations |  |  | $ 1,868,000 | $ 4,639,000 |
Face amount of debt |  |  | $ 26,400,000 |  |
Interest rate percentage |  |  | 2.77% |  |
Maturity date of debt |  |  | Jul. 31, 2018 |  |
Repayment period of debt |  |  | 5 years |  |
Periodic payments |  |  | $ 500,000 |  |
Frequency of periodic payment |  |  | per month |  |
Amount payable through the end of lease term |  |  | $ 1,900,000 |  |

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- Definition Amount of minimum lease payments for capital leases net of executory costs, which include amounts paid by the lessee to the lessor for insurance, maintenance and taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 + Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + 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(a)(1)) -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 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
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- 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://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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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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