Satterfield Corporation reported the following current accounts at December 31, 2016 (amounts in thousands):

Cash .......................................... $1,500

Receivables................................... 5,900

Inventory..................................... 2,700

Prepaid expenses............................. 1,000

Accounts payable............................ 2,600

Unearned revenue............................ 1,600

Accrued expenses payable.................. 1,900

DuringJanuary 2017, Satterfield completed these selected transactions:

■ Sold services on account, $9,000

■ Depreciation expense, $400

■ Paid for expenses, $7,300

■ Collected from customers on account, $8,100

■ Accrued expenses, $500

■ Paid on account, $ 1,400

■ Used up prepaid expenses, $700

Compute Satterfield's net working capital and current ratio at December 31, 2016, and again at January 31, 2017. Did the net working capital and current ratio improve or deteriorate during January 2017? Comment on the level of the company's net working capital and current ratio.