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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Cash Flows from Operating Activities |  |  |  |
Net income | $ 4,461 | $ 10,569 | $ 7,806 | $ 8,811
Adjustments to reconcile net income to net cash provided by (used in) operating activities: |  |  |  |
Depreciation expense |  |  | 1,184 | 1,361
Restructuring |  |  | 0 | 309
Stock-based compensation |  |  | 850 | 762
Gain from extinguishment of debt (Paycheck Protection Program Term Note) | 0 | (10,000) | 0 | (10,000)
Net pension payment |  |  | (365) | (596)
Changes in assets and liabilities: |  |  |  |
Increase in accounts receivable and contract assets |  |  | (581) | (5,932)
Decrease (increase) in prepaid expenses, income tax receivable and other current assets |  |  | 526 | (590)
Increase in accounts payable and accrued expenses |  |  | 1,510 | 653
(Decrease) increase in other accrued expenses and liabilities |  |  | (1,068) | 508
Net cash provided by (used in) operating activities |  |  | 9,862 | (4,714)
Cash Flows from Investing Activities |  |  |  |
Purchases of property, plant and equipment |  |  | (3,616) | (984)
Proceeds from sale of property, plant and equipment |  |  | 57 | 101
Net cash used in investing activities |  |  | (3,559) | (883)
Cash Flows from Financing Activities |  |  |  |
Borrowings |  |  | 5,000 | 0
Repayment of borrowings |  |  | 0 | (4,000)
Debt financing costs |  |  | (123) | (301)
Payment of finance leases |  |  | (101) | (112)
Treasury stock activities |  |  | (268) | (118)
Net cash provided by (used in) financing activities |  |  | 4,508 | (4,531)
Effect of exchange rate changes on cash, cash equivalents and restricted cash |  |  | (3,111) | (462)
Net increase (decrease) in cash and cash equivalents and restricted cash |  |  | 7,700 | (10,590)
Cash and cash equivalents and restricted cash at beginning of period |  |  | 15,133 | 33,562
Cash and cash equivalents and restricted cash at end of period | 22,833 | 22,972 | 22,833 | 22,972
Supplemental disclosures |  |  |  |
Cash paid for interest |  |  | 186 | 264
Cash paid for income taxes, net |  |  | 478 | 959
Non-cash investing and financing activities |  |  |  |
Purchases of property, plant and equipment included in accounts payable |  |  | 2,576 | 1,322
Cash and cash equivalents | 10,570 | 11,911 | 10,570 | 11,911
Restricted cash | 2,337 | 3,222 | 2,337 | 3,222
Cash held in Escrow account included in other current assets (see Note E) | 9,926 | 0 | 9,926 | 0
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations | $ 22,833 | $ 22,972 | $ 22,833 | $ 22,972

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