|9 Months Ended|
Dec. 31, 2017
7. Intangible Assets
Intangible assets consisted of the following as of December 31, 2017 and March 31, 2017 (in thousands):
Amortization expense for the intangible assets was $0.1 million and $0.2 million for each of the three and nine months ended December 31, 2017 and 2016, respectively.
Expected future amortization expense of intangible assets as of December 31, 2017 is as follows (in thousands):
The manufacturing license provides the Company with the ability to manufacture recuperator cores previously purchased from Solar Turbines Incorporated (“Solar”). The Company is required to pay a per-unit royalty fee over a seventeen-year period for cores manufactured and sold by the Company using the technology. Royalties of approximately $9,200 and $7,400 were earned by Solar for the three months ended December 31, 2017 and 2016, respectively. Royalties of approximately $22,900 and $22,100 were earned by Solar for the nine months ended December 31, 2017 and 2016, respectively. Earned royalties of approximately $9,200 and $10,000 were unpaid as of December 31, 2017 and March 31, 2017, respectively, and are included in accounts payable and accrued expenses in the accompanying balance sheets.
The entire disclosure for all or part of the information related to intangible assets.
Reference 1: http://www.xbrl.org/2003/role/presentationRef