11. Commitments, Contingencies and Tax Obligation Lease Commitments The Group leases two premises in South Africa under operating leases. One location is an office facility and the other is a workshop. The office facility lease was originally scheduled to expire on April 30, 2012 and has been extended in a short-term basis several times. The lease term terminated on February 28, 2014 and the Company leased this office for an additional month in March 2014. The Company executed a one-year lease for a new office facility effective April 1, 2014 and was able to terminate this lease in May 2014. The lease for the Group s workshop facility originally expired on April 30, 2012 and was also extended on a short-term basis. The workshop is being leased on a month-to-month basis. On June 1, 2014, the Company lease new office and workshop facilities for a one-year term. The monthly rent for the office lease is approximately $ 1,800 and the monthly rent for the workshop is $ 900 . In addition to the payments required under the preceding leases, payments are made for space rentals on an as-needed basis. The total rent expense was approximately $ 11,000 and $ 17,000 for the three months ended March 31, 2015 and 2014, respectively . Rent expense is included in general and administrative expenses in the accompanying Consolidated Statements of Operations. The future rent commitments under the above leases for the twelve months ending December 31, 2015 is approximately $ 8,000 . Payroll Commitments The Group s employees in South Africa have employment contracts that provide for one month of notice before the employee can be terminated. As of March 31, 2015, the total monthly salary commitment applicable to these employees was approximately $ 12,500 . Payroll Tax Obligation During 2013, SPMSA received notification from the South African Revenue Service regarding unpaid payroll taxes of approximately $ 185,000 . SPMSA requested additional time to arrange a payment plan that is suitable to both parties and has commenced making monthl