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Commitments and contingencies (Tables) | 12 Months Ended
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Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract] |
Rent Expense | Hudson utilizes leased facilities and operates equipment under non-cancelable operating leases through July 2030. Below is a table of key properties : Properties
Location |  | Annual Rent |  | Lease Expiration Date |
Auburn, Washington |  | $ | 39,000 |  | 8/2018 |
Baton Rouge, Louisiana |  | $ | 23,000 |  | 5/2019 |
Catano, Puerto Rico |  | $ | 124,000 |  | 12/2020 |
Champaign, Illinois |  | $ | 504,000 |  | 12/2018 |
Charlotte, North Carolina |  | $ | 26,000 |  | 5/2019 |
Escondido, California |  | $ | 36,000 |  | Month to Month |
Hampstead, New Hampshire |  | $ | 52,000 |  | 8/2022 |
Nashville, Tennessee |  | $ | 173,000 |  | 3/2018 |
Long Beach, California |  | $ | 26,400 |  | 2/2020 |
Long Island City, New York |  | $ | 782,000 |  | 7/2018 |
Ontario, California |  | $ | 90,000 |  | 12/2018 |
Pearl River, New York |  | $ | 150,000 |  | 12/2021 |
Pottsboro, Texas |  | $ | 6,000 |  | 8/2017 |
Riverside, California |  | $ | 27,000 |  | Month to Month |
Smyrna, Georgia |  | $ | 446,000 |  | 7/2030 |
Stony Point, New York |  | $ | 90,000 |  | 6/2021 |
Tulsa, Oklahoma |  | $ | 27,000 |  | 12/2017 |
Summarized table of future commitments under operating leases | Future commitments under operating leases are summarized as follows:
Years ended December 31, |  | Amount |
(in thousands) |  |  |  |
-2018 |  | $ | 2,374 |
-2019 |  |  | 1,183 |
-2020 |  |  | 1,155 |
-2021 |  |  | 958 |
-2022 |  |  | 655 |
Thereafter |  |  | 3,943 |
Total |  | $ | 10,268 |

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- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
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- Definition Tabular disclosure of rental expense from operating leases for each period for which an income statement is presented with separate amounts for minimum rentals, contingent rentals, and sublease rentals. Rental payments under leases with terms of a month or less that were not renewed need not be included. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 + Details
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