Commitments	3 Months Ended
Mar. 31, 2020
Leases
Commitments	19. Commitments Commitment for inventory purchase The Company entered into a two-year non-rolling stock surplus contract with the U.S. Government Defense Logistics Agency (the “DLA”) in December 2017 with the option to extend for up to four-years. Pursuant to the contract, the original performance period commenced in April 2018 and concluded in March 2020. The Company has exercised its option for one year, extending the performance period to March 2021. The Company has committed to purchase between 150,000 and 245,900 units of property with an expected minimum value of $11,104,000 and up to $51,028,000 annually to the extent that goods are available from the DLA. At March 31, 2020, the Company has purchased $40,878,000 pursuant to the 12-month period of this contract which commenced in April 2019.

The entire disclosure for significant arrangements with third parties, which includes operating lease arrangements and arrangements in which the entity has agreed to expend funds to procure goods or services, or has agreed to commit resources to supply goods or services, and operating lease arrangements. Descriptions may include identification of the specific goods and services, period of time covered, minimum quantities and amounts, and cancellation rights.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-URI http://asc.fasb.org/topic&trid=2144648

Name:	us-gaap_CommitmentsDisclosureTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration