8.	COMMITMENTS AND CONTINGENCIES

Lease Commitments

In March 2004, the Company entered into a seven-year lease, beginning in August 2004, for approximately 16,500 square feet of mixed-use space from an unaffiliated third party at a base cost with escalations throughout the lease term plus additional common-area expenses based on the Company’s proportionate share of the lessor’s operating costs. The lease provided for two rent holidays, during which no rent was payable, and a moving allowance. In January 2011, the Company amended the lease effective January 1, 2011 to extend the term through January 2017 in exchange for a reduced rental rate and 50% rent abatement in the first 12 months of the extended term. The amended lease included 3% annual rent escalations and a one-time option to terminate the lease effective as of July 31, 2014. The Company exercised this right to terminate the lease by giving notice to the lessor prior to October 31, 2013. The cost to terminate the lease effective July 31, 2014 was approximately $112,000, which the Company paid at the time notice was given to terminate the lease. This amount reflects all unamortized lease transaction costs, including, without limitation, all rent abated since January 1, 2011, plus two months’ rent at the then-current rental rate. On December 9, 2013, the Company entered into a Lease Agreement, as amended on December 23, 2013 and April 15, 2014 (the “Lease Agreement”), for a new corporate headquarters, which occupies approximately 36,350 square feet of office, storage, and light manufacturing space. The Company took possession of the leased property on May 23, 2014 once certain improvements to the leased space were completed, and did not have access to the property before this date. These improvements and other lease signing and moving incentives offered by the landlord totaled approximately $550,000 and $73,000, respectively, which will be amortized over the life of the lease until October 31, 2021. Included in the Lease Agreement is a seven-month rent abatement period effective June 2014 through December 2014.

The Company recognizes rent expense on a straight-line basis, giving consideration to the rent holidays and escalations, the lease signing and moving allowance to be paid to the Company, and the rent abatement.

As of December 31, 2014, the Company’s future minimum payments under the operating leases were as follows:

2015	$	553,905
2016		569,138
2017		584,789
2018		600,871
2019		617,395
Thereafter		1,176,330
Total	$	4,102,428

Rent expense for the years ended December 31, 2014 and 2013 was approximately $373,000 and $336,000, respectively.

Purchase Commitments

On June 6, 1997, the Company entered into an amended and restated exclusive supply agreement with Cree, Inc. (“Cree”). The exclusive supply agreement had an initial term of ten years that was extended in January 2005 to July 2015. In connection with the amended and restated exclusive supply agreement, the Company committed to purchase from Cree a minimum of 50%, by dollar volume, of its raw material SiC crystal requirements. If the Company’s orders required Cree to expand beyond specified production levels, the Company committed to purchase certain minimum quantities. Effective February 8, 2013, the Company entered into an amendment to a prior letter agreement with Cree, which provided a framework for the Company’s purchases of SiC crystals under the amended and restated exclusive supply agreement. Pursuant to this amendment, the Company agreed to purchase at least $4.00 million of SiC crystals in an initial new order. After the initial new order, the Company agreed to issue non-cancellable, quarterly orders that must equal or exceed a set minimum order quantity. The total purchase commitment under the amendment (as subsequently amended) until July 2015, including the initial new order, was dependent upon the grade of the material and ranged between approximately $7.64 million and approximately $18.56 million.

On December 12, 2014, the Company entered into a new exclusive supply agreement with Cree (the “New Supply Agreement”), which superseded and replaced (with respect to materials ordered subsequent to the effective date of the New Supply Agreement) the exclusive supply agreement that was set to expire in 2015. Under the New Supply Agreement, subject to certain terms and conditions, the Company agreed to exclusively purchase from Cree, and Cree agreed to exclusively supply, 100% of the Company’s required SiC materials in quarterly installments that must equal or exceed a set minimum order quantity. The initial term of the New Supply Agreement will expire on June 24, 2018, unless extended by the parties. The Company also has one option to unilaterally extend the term of the agreement for an additional two-year period, subject to certain conditions. The Company’s total purchase commitment under the New Supply Agreement until June 2018 is dependent upon the size of the SiC material and ranges between approximately $29.6 million and approximately $31.5 million.

During the year ended December 31, 2014 and 2013, the Company purchased approximately $5.84 million and $12.56 million, respectively, of SiC crystals from Cree.