Gross profit and gross profit margin decreased to $86.4 million and 34.9% respectively for the year ended December 31, 2019 from $107.0 million and 39.0%, respectively, in the prior year. The primary driver of the declines was the negative leverage on fixed costs as a result of lower revenue combined with the $2.5 million incremental timber provision, as previously discussed. Adjusted Gross Profit and Adjusted Gross Profit Margin decreased to $97.9 million and 39.5%, respectively, in 2019 from $116.5 million and 42.4%, respectively, in the prior year period. Excluded from Adjusted Gross Profit calculations in 2019 are $2.2 million of overhead costs associated with operating at abnormally low capacity levels, as described above.
Sales and marketing expenses declined to $33.9 million for the year ended December 31, 2019 from $40.6 million in the prior year period. Included in these expenses were $2.0 million of one time consulting costs related to the sales and marketing plan developed with the assistance of an internationally recognized consulting firm, offset by a $3.4 million reduction in commission expense on lower revenue, $2.6 million elimination ofnon-sales generating travel, meals and entertainment expenses and lower salary and benefit expenses due to reductions in sales and marketing headcount year over year.
General and administrative expenses decreased to $27.6 million for the year ended December 31, 2019 from $28.7 million in the prior year period. In 2019, personnel costs were lower as a result of reductions in headcount and variable compensation, offset by $2.6 million of costs related to the listing of our Common Shares on Nasdaq and $1.3 million in costs associated with ongoing litigation. Comparatively, in 2018, we incurred $2.1 million of costs related to proxy defense and certain special committee costs which did not reoccur in 2019.
Operations support expenses increased to $11.0 million for the year ended December 31, 2019, from $8.1 million for the prior year period. The increase is attributable to consultant costs of $1.1 million incurred to assist with the evaluation of current operations and to assist with the rectification of the tile warping issue and to increased personnel costs due to higher headcount to better support project execution and support of our Distribution Partners.
Technology and development expenses increased to $7.8 million for the year ended December 31, 2019, compared to $4.2 million for the prior year period. These increases are due to a $1.7 million decrease in capitalized salaries for the year ended December 31, 2019, as the current mix of projects undertaken by us included a higher portion of efforts related to business process improvements that were not eligible for capitalization. Additionally, we incurred additional salary and benefit costs of $0.7 million that were classified as cost of sales of technical services during the year ended December 31, 2018.
Net loss for the year ended December 31, 2019 was $4.4 million or $(0.05)/share vs. net income of $5.6 million or $0.07/share for the prior year period. The decline is primarily the result of an $20.6 million decrease in gross profit margin, $5.7 million ofone-time costs, $1.3 million of litigation costs and a $4.5 million increase in foreign exchange loss. These cost increases were offset by a $3.4 million reduction in commission expenses, a $2.8 million reduction in reorganization expenditures, a $8.7 million impairment in 2018 with no impairments in 2019, a $2.1 millionone-time cost in 2018 related to advisory and other costs associated with activist defense and special committee of the Board of Directors with no such costs in 2019, a $2.3 million reduction in income tax expense, and other operating expenditure reductions. Net loss margin was (1.8)% for the year ended December 31, 2019.