The thousands of years were fulfilled during the old testament period when satan was bound. John's vision in Revelation 20 took him BACK IN TIME. John said that he saw the "ANCIENT serpent" in a great chain and cast into the abyss. John saw the "ANCIENT serpent" cast into the abyss. The proof that satan was bound during the ot period is that there was no satanic activity during the old testament period.
Then John's vision takes him to the "little season" in His present time. The "little season" was that period of time between Christ's first and second comings. This is when satan was loosed. This is the very first time we see satanic activity since the temptation in the garden. There was no satanic activity after the garden incident UNTIL Christ appeared. The absence of ALL satanic activity before Christ proves that satan was bound until Christ's first coming.
Thus the first saints were in the "little season" but in the end of it. We know this to be true because satan's judgment was NEAR TO THEM. Jesus said, "NOW is the judgment of this world. NOW is the prince of this world cast out" (John 12:32). Paul said that satan would be "SHORTLY" dashed to pieces under the feet of the first Christians (Rom. 16:20). So satan was dashed to pieces under THEIR feet and subsequently cast into the lake of fire.
So here is the true biblical chronology:
1. Satan bound around the time he was cursed in the garden and throughout the old testament period (no satanic activity).
2. He was loosed for the "little season" between Christ's first coming and His second coming in ad70 (all kinds of satanic activity during this time).
3. He was judged in ad70 and cast into the lake of fire (mankind is the sole source of all evil now).
4. We are in the new earth which is the eternal new covenant age (The first heaven and earth were the old covenant, Deuteronomy chaps 30-32. The physical heaven and earth has no prophetic relevance).
1Ch 21:1 And Satan stood up against Israel, and provoked David to number Israel.
Job 1:6 Now there was a day when the sons of God came to present themselves before the LORD, and Satan came also among them.
Job 1:7 And the LORD said unto Satan, Whence comest thou? Then Satan answered the LORD, and said, From going to and fro in the earth, and from walking up and down in it.
Job 1:8 And the LORD said unto Satan, Hast thou considered my servant Job, that [there is] none like him in the earth, a perfect and an upright man, one that feareth God, and escheweth evil?
Job 1:9 Then Satan answered the LORD, and said, Doth Job fear God for nought?
Job 1:12 And the LORD said unto Satan, Behold, all that he hath [is] in thy power; only upon himself put not forth thine hand. So Satan went forth from the presence of the LORD.
Job 2:1 Again there was a day when the sons of God came to present themselves before the LORD, and Satan came also among them to present himself before the LORD.
Job 2:2 And the LORD said unto Satan, From whence comest thou? And Satan answered the LORD, and said, From going to and fro in the earth, and from walking up and down in it.
Job 2:3 And the LORD said unto Satan, Hast thou considered my servant Job, that [there is] none like him in the earth, a perfect and an upright man, one that feareth God, and escheweth evil? and still he holdeth fast his integrity, although thou movedst me against him, to destroy him without cause.
Job 2:4 And Satan answered the LORD, and said, Skin for skin, yea, all that a man hath will he give for his life.
Job 2:6 And the LORD said unto Satan, Behold, he [is] in thine hand; but save his life.
Job 2:7 So went Satan forth from the presence of the LORD, and smote Job with sore boils from the sole of his foot unto his crown.
Psa 109:6 Set thou a wicked man over him: and let Satan stand at his right hand.
Zec 3:1 And he shewed me Joshua the high priest standing before the angel of the LORD, and Satan standing at his right hand to resist him.