You observe a company with the following items on the balance sheet (in thousands):

Cash and equivalents 2018: $20

Cash and equivalents 2017: $20

Inventory 2018: $38

Inventory 2017: $37

Accounts receivable 2018: $99

Accounts receivable 2017: $91

Property, Plant, and Equipment 2018: $1,711

Property, Plant, and Equipment 2017: $1,245

Current Liabilities 2018: $274

Current Liabilities 2017: $237

Long-term debt 2018: $793

Long-term debt 2017: $1,706

What is the change in net working capital for the firm for these years.