Per the 10Q filed 2017-11-28:
On November 22, 2017, the Company notified one of its customers that the Company was terminating an aircraft management agreement with them due to their on-going and repeated failure to make payment in full of all amounts due under the contract. The contract represents a material portion of the Company’s consolidated revenues ($4.0 million for the first nine months of 2017), but has not contributed significantly to either consolidated gross profit or net profit. The Company also informed the customer that it would seek damages for losses and expenses in light of the customer’s repudiatory breach of the contract. Depending on the outcome of negotiations with the customer, and possibly litigation, the receivables owed to the Company for services rendered, together with damages, would be applied against the operating deposit of $750,000 to be repaid to the customer following contract termination.