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Other Current Liabilities	3 Months Ended
Other Current Liabilities	Mar. 31, 2019
Other Current Liabilities [Abstract]
Other Current Liabilities	11. Other Current Liabilities Included in other current liabilities for the period ended March 31, 2019 is $47,000 related to a lease liability for office space at the Company’s principal headquarters in Golden and in Mexico and Argentina (see Note 4).