|6 Months Ended|
Sep. 30, 2018
7. Intangible Assets
Intangible assets consisted of the following as of September 30, 2018 and March 31, 2018 (in thousands):
Amortization expense for the intangible assets was $0.1 million for each of the three and six months ended September 30, 2018 and 2017, respectively.
Expected future amortization expense of intangible assets as of September 30, 2018 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 $10,000 and $7,200 were earned by Solar for the three months ended September 30, 2018 and 2017, respectively. Royalties of approximately $17,100 and $13,700 were earned by Solar for the six months ended September 30, 2018 and 2017, respectively. Earned royalties of approximately $10,000 and $8,000 were unpaid as of September 30, 2018 and March 31, 2018, respectively, and are included in accounts payable and accrued expenses in the accompanying condensed consolidated balance sheets.
The entire disclosure for all or part of the information related to intangible assets.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef